diff --git a/CMakeLists.txt b/CMakeLists.txt
index cc6fea8..913b59d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -116,20 +116,35 @@ set(SOURCES
         src/game/physics/holes/collectable_simulation.cpp
         src/game/physics/holes/collectable_simulation.hpp
         src/game/physics/holes/holes_simulation.cpp
-        src/game/physics/holes/holes_simulation.hpp src/game/physics/holes/layouts/hole_description.hpp src/game/physics/holes/layouts/hole_layout.cpp src/game/physics/holes/layouts/hole_layout.hpp src/game/physics/holes/layouts/depth_hole_layout.hpp src/game/physics/holes/layouts/depth_hole_description.hpp)
+        src/game/physics/holes/holes_simulation.hpp
+        src/game/physics/holes/layouts/hole_description.hpp
+        src/game/physics/holes/layouts/hole_layout.cpp
+        src/game/physics/holes/layouts/hole_layout.hpp
+        src/game/physics/holes/layouts/depth_hole_layout.hpp
+        src/game/physics/holes/layouts/depth_hole_description.hpp)
 
 set(PHYSICS_00_SOURCES
-       src/prototypes/physics_00.cpp)
+        src/prototypes/physics_00.cpp)
 
 set(MATH_00_SOURCES
         src/prototypes/math_00.cpp)
 
+set(COORDINATES_00_SOURCES
+        src/prototypes/coordinates_00.cpp
+        src/coordinates/coordinates.h
+        src/coordinates/coordinate_transformer.h
+        src/coordinates/coordinate_transformer.cpp
+        src/coordinates/translated_coordinates.h
+        src/coordinates/translated_coordinates.cpp)
+
 # Add an executable target
 add_executable(Holesome ${SOURCES})
 add_executable(Physics_00 ${PHYSICS_00_SOURCES})
 
 add_executable(Math_00 ${MATH_00_SOURCES})
 
+add_executable(Coordinates_00 ${COORDINATES_00_SOURCES})
+
 # Link SFML and other libraries to your executable target
 target_link_libraries(Holesome sfml-graphics sfml-audio)
 target_link_libraries(Holesome Eigen3::Eigen)
@@ -139,6 +154,8 @@ target_link_libraries(Physics_00 box2d::box2d)
 
 target_link_libraries(Math_00 Eigen3::Eigen)
 
+target_link_libraries(Coordinates_00 Eigen3::Eigen)
+
 # Assets
 add_custom_target(copy_assets
         COMMAND ${CMAKE_COMMAND} -E copy_directory ${CMAKE_CURRENT_LIST_DIR}/assets ${CMAKE_CURRENT_BINARY_DIR}/assets
diff --git a/TODO.md b/TODO.md
index 9622f7e..a59aa5b 100644
--- a/TODO.md
+++ b/TODO.md
@@ -6,7 +6,6 @@
 
 ## Bugs
 
-- Player spawns initially at (0,0) and almost fails to jump to target spawn
 - Player disconnect in multiplayer sometimes targeting disconnected player or something like that
 
 ## High priority
@@ -14,6 +13,7 @@
 - Physics
 - Players-join-screen before the game starts
 
+- Short input delay when a new identity connects, to avoid accidental inputs at beginning
 - Procedural points generation
 - Game over screen
 - Proper player graphics
diff --git a/src/config.h b/src/config.h
index 72edde3..a292354 100644
--- a/src/config.h
+++ b/src/config.h
@@ -13,7 +13,7 @@
 #define PLAYER_RADIUS_PER_LEVEL 0.25f
 
 // World
-#define WORLD_GRAVITY b2Vec2(0.f, -9.8f)
+#define WORLD_GRAVITY b2Vec2(0.f, 0.f)
 #define SKY_HEIGHT_SCALE 2.f
 
 // FPS
@@ -49,9 +49,10 @@
 #define COLLECTABLES_SIM_LINEAR_DAMPING 0.5f
 #define COLLECTABLES_SIM_ANGULAR_DAMPING 0.5f
 #define COLLECTABLES_SIM_DENSITY 1.f
-#define COLLECTABLES_SIM_FRICTION 0.3f
+#define COLLECTABLES_SIM_FRICTION 0.0f
 #define COLLECTABLES_SIM_RESTITUTION 0.5f
 #define COLLECTABLES_SIM_SLEEPING true
+#define COLLECTABLES_SIM_GROUND_THICKNESS 0.1f
 
 // Directions
 #define DIRECTION_HARD_ACTIVATION_THRESHOLD 0.1f
diff --git a/src/coordinates/coordinate_transformer.cpp b/src/coordinates/coordinate_transformer.cpp
index 15a99aa..887a706 100644
--- a/src/coordinates/coordinate_transformer.cpp
+++ b/src/coordinates/coordinate_transformer.cpp
@@ -1,11 +1,12 @@
 #include "coordinate_transformer.h"
 #include "../config.h"
 #include "../logging/easylogging++.h"
+#include "../utilities/vector_utils.hpp"
 
 // Initialize matrix
 const Eigen::Matrix<float, 3, 3> CoordinateTransformer::worldToIsometricMatrix =
         (Eigen::Matrix<float, 3, 3>() <<
-                1, -1, 0,
+                                      1, -1, 0,
                 -ISOMETRIC_SKEW, -ISOMETRIC_SKEW, -1,
                 1, 1, 0
         ).finished();
@@ -17,19 +18,21 @@ IsometricCoordinates CoordinateTransformer::worldToIsometric(WorldCoordinates wo
 
     Eigen::Vector3f isoCoordinatesVector = worldToIsometricMatrix * worldCoordinatesVector;
 
-    return IsometricCoordinates(
+    return {
             isoCoordinatesVector.x() * WORLD_TO_ISO_SCALE,   // x
             isoCoordinatesVector.y() * WORLD_TO_ISO_SCALE,   // y
             isoCoordinatesVector.z()    // depth
-    );
+    };
 }
 
 WorldCoordinates CoordinateTransformer::isometricToWorld(IsometricCoordinates isometricCoordinates)
 {
-Eigen::Vector3f isoCoordinatesVector;
-    isoCoordinatesVector << isometricCoordinates.x, isometricCoordinates.y, isometricCoordinates.depth;
+    Eigen::Vector3f isoCoordinatesVector;
+    isoCoordinatesVector << isometricCoordinates.x / WORLD_TO_ISO_SCALE,
+            isometricCoordinates.y / WORLD_TO_ISO_SCALE,
+            isometricCoordinates.depth;
 
-    Eigen::Vector3f worldCoordinatesVector = worldToIsometricMatrix.inverse() * isoCoordinatesVector / WORLD_TO_ISO_SCALE;
+    Eigen::Vector3f worldCoordinatesVector = worldToIsometricMatrix.inverse() * isoCoordinatesVector;
 
     return {
             worldCoordinatesVector.x(),   // x
@@ -37,3 +40,41 @@ Eigen::Vector3f isoCoordinatesVector;
             worldCoordinatesVector.z()    // z
     };
 }
+
+float CoordinateTransformer::worldToDepth(sf::Vector2f worldGroundCoordinates)
+{
+    return CoordinateTransformer::worldToIsometric({worldGroundCoordinates.x, worldGroundCoordinates.y, 0}).depth;
+}
+
+sf::Vector2f CoordinateTransformer::closestWorldPointAtDepth(float depth, sf::Vector2f referenceWorldPoint)
+{
+    float depthAtReferencePoint = worldToDepth(referenceWorldPoint);
+    float depthDifference = depth - depthAtReferencePoint;
+    float stepSizePerAxis = depthDifference / 2.f;
+    return referenceWorldPoint + sf::Vector2f(stepSizePerAxis, stepSizePerAxis);
+}
+
+DiagonalWorldCoordinates CoordinateTransformer::worldToDiagonal(WorldCoordinates worldCoordinates)
+{
+    auto depth = CoordinateTransformer::worldToDepth(worldCoordinates.toGroundCoordinates());
+
+    auto depthCenterCoordinates = CoordinateTransformer::closestWorldPointAtDepth(depth, {0, 0});
+    auto horizontal = length(worldCoordinates.toGroundCoordinates() - depthCenterCoordinates);
+
+    return {horizontal, worldCoordinates.z, depth};
+}
+
+WorldCoordinates CoordinateTransformer::diagonalToWorld(DiagonalWorldCoordinates diagonalWorldCoordinates)
+{
+    auto depthCenterCoordinates = CoordinateTransformer::closestWorldPointAtDepth(diagonalWorldCoordinates.depth,
+                                                                                  {0, 0});
+
+    auto const horizontalAxis = sf::Vector2f(1, -1);
+    auto worldGroundCoordinates = depthCenterCoordinates + horizontalAxis * diagonalWorldCoordinates.horizontal;
+
+    return {
+            worldGroundCoordinates.x,
+            worldGroundCoordinates.y,
+            diagonalWorldCoordinates.vertical
+    };
+}
diff --git a/src/coordinates/coordinate_transformer.h b/src/coordinates/coordinate_transformer.h
index 49eed93..35508a6 100644
--- a/src/coordinates/coordinate_transformer.h
+++ b/src/coordinates/coordinate_transformer.h
@@ -12,6 +12,10 @@ private:
 public:
     static IsometricCoordinates worldToIsometric(WorldCoordinates worldCoordinates);
     static WorldCoordinates isometricToWorld(IsometricCoordinates isometricCoordinates);
+    static DiagonalWorldCoordinates worldToDiagonal(WorldCoordinates worldCoordinates);
+    static WorldCoordinates diagonalToWorld(DiagonalWorldCoordinates diagonalWorldCoordinates);
+    static float worldToDepth(sf::Vector2f worldGroundCoordinates);
+    static sf::Vector2f closestWorldPointAtDepth(float depth, sf::Vector2f referenceWorldPoint);
 };
 
 
diff --git a/src/coordinates/coordinates.h b/src/coordinates/coordinates.h
index de1419d..ed55cf6 100644
--- a/src/coordinates/coordinates.h
+++ b/src/coordinates/coordinates.h
@@ -2,6 +2,9 @@
 #define HOLESOME_COORDINATES_H
 
 #include <SFML/System/Vector2.hpp>
+#include "../utilities/vector_utils.hpp"
+
+class DiagonalWorldCoordinates;
 
 struct WorldCoordinates
 {
@@ -54,6 +57,11 @@ struct WorldCoordinates
     {
         return !(*this == other);
     }
+
+    [[nodiscard]] sf::Vector2f toGroundCoordinates() const
+    {
+        return {x, y};
+    }
 };
 
 struct IsometricCoordinates
@@ -76,6 +84,19 @@ struct IsometricCoordinates
     {}
 };
 
+struct DiagonalWorldCoordinates
+{
+    float horizontal;
+    float vertical;
+    float depth;    // Bigger means further back. Can be used for accurate rendering order.
+
+    const sf::Vector2f horizontalAxis = {1, -1};
+
+    DiagonalWorldCoordinates(float horizontal, float vertical, float depth) : horizontal(horizontal),
+                                                                              vertical(vertical), depth(depth)
+    {}
+};
+
 struct GridCoordinates
 {
     float x;
diff --git a/src/coordinates/translated_coordinates.cpp b/src/coordinates/translated_coordinates.cpp
index e761c19..07f4d03 100644
--- a/src/coordinates/translated_coordinates.cpp
+++ b/src/coordinates/translated_coordinates.cpp
@@ -2,7 +2,8 @@
 
 #include <utility>
 
-WorldCoordinates TranslatedCoordinates::world() const {
+WorldCoordinates TranslatedCoordinates::world() const
+{
     auto coordinates = worldCoordinates;
     if (parent != nullptr)
     {
@@ -12,35 +13,42 @@ WorldCoordinates TranslatedCoordinates::world() const {
     return coordinates;
 }
 
-IsometricCoordinates TranslatedCoordinates::isometric() const {
+IsometricCoordinates TranslatedCoordinates::isometric() const
+{
     return CoordinateTransformer::worldToIsometric(world());
 }
 
-GridCoordinates TranslatedCoordinates::grid() const {
+GridCoordinates TranslatedCoordinates::grid() const
+{
     auto referenceWordCoordinates = world();
 
     // Grid coords are just camera coords without height, and scaled differently
     return {referenceWordCoordinates.x - 0.5f, referenceWordCoordinates.y - 0.5f};
 }
 
-void TranslatedCoordinates::setWorld(WorldCoordinates newWorldCoordinates) {
+void TranslatedCoordinates::setWorld(WorldCoordinates newWorldCoordinates)
+{
     this->worldCoordinates = newWorldCoordinates;
 }
 
-void TranslatedCoordinates::setIsometric(IsometricCoordinates newIsometricCoordinates) {
+void TranslatedCoordinates::setIsometric(IsometricCoordinates newIsometricCoordinates)
+{
     this->worldCoordinates = CoordinateTransformer::isometricToWorld(newIsometricCoordinates);
 }
 
-void TranslatedCoordinates::setTranslated(const TranslatedCoordinates& newCoordinates) {
+void TranslatedCoordinates::setTranslated(const TranslatedCoordinates &newCoordinates)
+{
     this->worldCoordinates = newCoordinates.world();
 }
 
-void TranslatedCoordinates::move(WorldCoordinates deltaWorldCoordinates) {
+void TranslatedCoordinates::move(WorldCoordinates deltaWorldCoordinates)
+{
     this->worldCoordinates = this->worldCoordinates + deltaWorldCoordinates;
 }
 
 TranslatedCoordinates::TranslatedCoordinates(WorldCoordinates worldCoordinates)
-        : worldCoordinates(worldCoordinates) {
+        : worldCoordinates(worldCoordinates)
+{
 }
 
 void TranslatedCoordinates::move(sf::Vector2f deltaWorldCoordinates)
@@ -73,3 +81,18 @@ TranslatedCoordinates::TranslatedCoordinates(GridCoordinates gridCoordinates)
 {
     setGrid(gridCoordinates);
 }
+
+DiagonalWorldCoordinates TranslatedCoordinates::diagonalWorld() const
+{
+    return CoordinateTransformer::worldToDiagonal(world());
+}
+
+void TranslatedCoordinates::setDiagonal(DiagonalWorldCoordinates newDiagonalWorldCoordinates)
+{
+    this->worldCoordinates = CoordinateTransformer::diagonalToWorld(newDiagonalWorldCoordinates);
+}
+
+TranslatedCoordinates::TranslatedCoordinates(DiagonalWorldCoordinates diagonalWorldCoordinates)
+{
+    setDiagonal(diagonalWorldCoordinates);
+}
diff --git a/src/coordinates/translated_coordinates.h b/src/coordinates/translated_coordinates.h
index d182394..e0482e5 100644
--- a/src/coordinates/translated_coordinates.h
+++ b/src/coordinates/translated_coordinates.h
@@ -9,6 +9,7 @@ class TranslatedCoordinates
 {
 public:
     explicit TranslatedCoordinates(WorldCoordinates worldCoordinates);
+    explicit TranslatedCoordinates(DiagonalWorldCoordinates diagonalWorldCoordinates);
     explicit TranslatedCoordinates(GridCoordinates gridCoordinates);
 
     [[nodiscard]] WorldCoordinates world() const;
@@ -17,12 +18,16 @@ public:
 
     [[nodiscard]] GridCoordinates grid() const;
 
+    [[nodiscard]] DiagonalWorldCoordinates diagonalWorld() const;
+
     void setWorld(WorldCoordinates newWorldCoordinates);
 
     void setTranslated(const TranslatedCoordinates& newCoordinates);
 
     void setIsometric(IsometricCoordinates newIsometricCoordinates);
 
+    void setDiagonal(DiagonalWorldCoordinates newDiagonalWorldCoordinates);
+
     void setGrid(GridCoordinates newGridCoordinates);
 
     void move(WorldCoordinates deltaWorldCoordinates);
diff --git a/src/game/collectables/collectable.cpp b/src/game/collectables/collectable.cpp
index 94cdbb6..db56a81 100644
--- a/src/game/collectables/collectable.cpp
+++ b/src/game/collectables/collectable.cpp
@@ -13,9 +13,9 @@ void Collectable::setRotation(float angle)
 
 }
 
-int Collectable::getDepth() const
+float Collectable::getDepth() const
 {
-    return static_cast<int>(coordinates->isometric().depth);
+    return coordinates->isometric().depth;
 }
 
 void Collectable::setSprite(const std::string &spriteName)
@@ -24,5 +24,8 @@ void Collectable::setSprite(const std::string &spriteName)
     float sizeWidth = 1.f * WORLD_TO_ISO_SCALE;
     auto size = sf::Vector2f{sizeWidth, sizeWidth};
     auto sprite = std::make_shared<VersatileSprite>(spriteName, size);
-    addChildScreenOffset(sprite, IsometricCoordinates(-sizeWidth / 2.f, -sizeWidth));
+    addChildScreenOffset(sprite, IsometricCoordinates(-size / 2.f));
+
+    // Set half size offset of coordinates
+    coordinates->move(WorldCoordinates(0, 0, sizeWidth / 2.f));
 }
diff --git a/src/game/collectables/collectable.hpp b/src/game/collectables/collectable.hpp
index dbb816d..98e6d10 100644
--- a/src/game/collectables/collectable.hpp
+++ b/src/game/collectables/collectable.hpp
@@ -13,7 +13,7 @@ public:
 
     void setRotation(float angle);
 
-    int getDepth() const;
+    float getDepth() const;
 
     int getId() const
     {
diff --git a/src/game/collectables/collection/collectables_collection.cpp b/src/game/collectables/collection/collectables_collection.cpp
index dabee5c..093d68a 100644
--- a/src/game/collectables/collection/collectables_collection.cpp
+++ b/src/game/collectables/collection/collectables_collection.cpp
@@ -1,4 +1,6 @@
 #include "collectables_collection.hpp"
+
+#include <cmath>
 #include "collectables_depth_collection.hpp"
 #include "../../../logging/easylogging++.h"
 
@@ -51,10 +53,11 @@ void CollectablesCollection::update()
     // Then, move collectables to new depth collections
     for (auto &[depth, depthCollection]: depthCollections)
     {
-        for (auto &collectable: depthCollection->collectables)
+        auto collectables = depthCollection->collectables;
+        for (auto &collectable: collectables)
         {
-            auto newDepth = collectable->getDepth();
-            if (newDepth != depth)
+            int newDepth = std::floor(collectable->getDepth());
+            if (newDepth != depth && newDepth < depthCollections.size())
             {
                 depthCollection->remove(collectable);
                 depthCollections[newDepth]->add(collectable);
diff --git a/src/game/game_factory.cpp b/src/game/game_factory.cpp
index 84177e0..30b5104 100644
--- a/src/game/game_factory.cpp
+++ b/src/game/game_factory.cpp
@@ -39,6 +39,6 @@ sf::ContextSettings GameFactory::getAdditionalSettings() {
 }
 
 void GameFactory::applyAdditionalWindowConfig(sf::RenderWindow *window) {
-    window->setFramerateLimit(FRAME_RATE);
+//    window->setFramerateLimit(FRAME_RATE);
     window->setKeyRepeatEnabled(KEY_REPEAT_ENABLED);
 }
diff --git a/src/game/game_object.cpp b/src/game/game_object.cpp
index c75ca70..07bda62 100644
--- a/src/game/game_object.cpp
+++ b/src/game/game_object.cpp
@@ -79,3 +79,8 @@ void GameObject::physicsUpdate()
         child->physicsUpdate();
     }
 }
+
+void GameObject::addDetachedChild(const std::shared_ptr<GameObject> &child)
+{
+    children.push_back(child);
+}
diff --git a/src/game/game_object.h b/src/game/game_object.h
index a87fede..456092e 100644
--- a/src/game/game_object.h
+++ b/src/game/game_object.h
@@ -26,6 +26,7 @@ public:
     void addChildScreenOffset(const std::shared_ptr<GameObject> &child, IsometricCoordinates offset = {0, 0});
     void addChildWorldOffset(const std::shared_ptr<GameObject> &child, WorldCoordinates offset);
     void addChild(const std::shared_ptr<GameObject> &child);
+    void addDetachedChild(const std::shared_ptr<GameObject> &child);
     void removeChild(const std::shared_ptr<GameObject> &child);
     void clearChildren();
     [[nodiscard]] std::vector<std::shared_ptr<GameObject>> getChildren() const { return children; }
diff --git a/src/game/level/level_loader.cpp b/src/game/level/level_loader.cpp
index f117449..859ffcc 100644
--- a/src/game/level/level_loader.cpp
+++ b/src/game/level/level_loader.cpp
@@ -61,6 +61,13 @@ void LevelLoader::loadLevel(const LevelConfig &levelConfig)
     }
 
 
+    for (int i = 0; i <= 25; i++)
+    {
+        auto debugImage = SpriteFactory::createSingleSprite("edge");
+        debugImage->coordinates->setWorld({0, 0, (float) i});
+        levelRenderer->addDetachedChild(debugImage);
+    }
+
 
     LOG(INFO) << "Finished loading level '" << levelConfig.name << "'.";
 }
@@ -81,7 +88,7 @@ void LevelLoader::spawnCollectable(const CollectableInLevel &collectableInfo)
 {
     LOG(INFO) << "Spawning collectable '" << collectableInfo.name << "' ...";
     auto collectable = CollectableFactory::createFromInLevelConfig(collectableInfo);
-    LOG(DEBUG) << "Has depth " << collectable->getDepth() << ".";
+    LOG(INFO) << "Has depth " << collectable->getDepth() << ".";
     CollectablesCollection::getInstance()->add(collectable);
     HolesSimulation::getInstance()->addCollectable(collectable);
 }
diff --git a/src/game/physics/holes/collectable_simulation.cpp b/src/game/physics/holes/collectable_simulation.cpp
index 191d605..46ed060 100644
--- a/src/game/physics/holes/collectable_simulation.cpp
+++ b/src/game/physics/holes/collectable_simulation.cpp
@@ -1,7 +1,8 @@
 #include "collectable_simulation.hpp"
 
-#include <utility>
+#include "../../../logging/easylogging++.h"
 #include "../../../config.h"
+#include "layouts/hole_layout.hpp"
 
 CollectableSimulation::CollectableSimulation(const std::shared_ptr<Collectable> &collectable)
         : collectable(collectable)
@@ -11,24 +12,8 @@ CollectableSimulation::CollectableSimulation(const std::shared_ptr<Collectable>
     world->SetAllowSleeping(COLLECTABLES_SIM_SLEEPING);
 
     // Create body
-    b2BodyDef bodyDef;
-    bodyDef.type = b2_dynamicBody;
-    bodyDef.angularDamping = COLLECTABLES_SIM_ANGULAR_DAMPING;
-    bodyDef.linearDamping = COLLECTABLES_SIM_LINEAR_DAMPING;
-//    bodyDef.position.Set(collectable->getPosition().x, collectable->getPosition().y);
-    body = world->CreateBody(&bodyDef);
-
-    // Create shape
-    b2CircleShape shape;
-//    shape.m_radius = collectable->getRadius();
-
-    // Create fixture
-    b2FixtureDef fixtureDef;
-    fixtureDef.shape = &shape;
-    fixtureDef.friction = COLLECTABLES_SIM_FRICTION;
-    fixtureDef.restitution = COLLECTABLES_SIM_RESTITUTION;
-    fixtureDef.density = COLLECTABLES_SIM_DENSITY;
-    body->CreateFixture(&fixtureDef);
+    auto coordinates = collectable->coordinates->diagonalWorld();
+    body = addSquareBody(b2_dynamicBody, {coordinates.horizontal, coordinates.vertical}, sf::Vector2f(1, 1));
 }
 
 void CollectableSimulation::physicsUpdate()
@@ -36,6 +21,30 @@ void CollectableSimulation::physicsUpdate()
     updateGroundHole();
 
     world->Step(FRAME_TIME.asSeconds(), COLLECTABLES_SIM_VELOCITY_ITERATIONS, COLLECTABLES_SIM_POSITION_ITERATIONS);
+
+    updateCollectable();
+}
+
+b2Body *CollectableSimulation::addSquareBody(b2BodyType type, sf::Vector2f center, sf::Vector2f size)
+{
+    b2BodyDef bodyDef;
+    bodyDef.type = type;
+    bodyDef.angularDamping = COLLECTABLES_SIM_ANGULAR_DAMPING;
+    bodyDef.linearDamping = COLLECTABLES_SIM_LINEAR_DAMPING;
+    bodyDef.position.Set(center.x, center.y);
+    b2Body *body = world->CreateBody(&bodyDef);
+
+    b2PolygonShape shape;
+    shape.SetAsBox(size.x / 2.f, size.y / 2.f);
+
+    b2FixtureDef fixtureDef;
+    fixtureDef.shape = &shape;
+    fixtureDef.friction = COLLECTABLES_SIM_FRICTION;
+    fixtureDef.restitution = COLLECTABLES_SIM_RESTITUTION;
+    fixtureDef.density = COLLECTABLES_SIM_DENSITY;
+
+    body->CreateFixture(&fixtureDef);
+    return body;
 }
 
 std::shared_ptr<Collectable> CollectableSimulation::getCollectable() const
@@ -45,5 +54,12 @@ std::shared_ptr<Collectable> CollectableSimulation::getCollectable() const
 
 void CollectableSimulation::updateGroundHole()
 {
-
+    auto holeLayout = HoleLayout::getInstance()->atDepth(collectable->getDepth());
+}
+
+void CollectableSimulation::updateCollectable()
+{
+    auto bodyPosition = body->GetPosition();
+    collectable->coordinates->setDiagonal({bodyPosition.x, bodyPosition.y, collectable->getDepth()});
+    collectable->setRotation(body->GetAngle());
 }
diff --git a/src/game/physics/holes/collectable_simulation.hpp b/src/game/physics/holes/collectable_simulation.hpp
index 6bf25cf..f04122d 100644
--- a/src/game/physics/holes/collectable_simulation.hpp
+++ b/src/game/physics/holes/collectable_simulation.hpp
@@ -22,6 +22,10 @@ private:
     std::shared_ptr<Collectable> collectable;
 
     void updateGroundHole();
+
+    void updateCollectable();
+
+    b2Body *addSquareBody(b2BodyType type, sf::Vector2f center, sf::Vector2f size);
 };
 
 
diff --git a/src/game/physics/holes/layouts/depth_hole_description.hpp b/src/game/physics/holes/layouts/depth_hole_description.hpp
index e804a40..a78958e 100644
--- a/src/game/physics/holes/layouts/depth_hole_description.hpp
+++ b/src/game/physics/holes/layouts/depth_hole_description.hpp
@@ -6,6 +6,10 @@ struct DepthHoleDescription
     int playerId;
     float x;
     float width;
+
+    DepthHoleDescription(int playerId, float x, float width)
+            : playerId(playerId), x(x), width(width)
+    {}
 };
 
 #endif //HOLESOME_DEPTH_HOLE_DESCRIPTION_HPP
diff --git a/src/game/physics/holes/layouts/depth_hole_layout.hpp b/src/game/physics/holes/layouts/depth_hole_layout.hpp
index b184c8b..f57c793 100644
--- a/src/game/physics/holes/layouts/depth_hole_layout.hpp
+++ b/src/game/physics/holes/layouts/depth_hole_layout.hpp
@@ -8,6 +8,10 @@ struct DepthHoleLayout
 {
     float depth;
     std::vector<DepthHoleDescription> holes;
+
+    DepthHoleLayout(float depth, std::vector<DepthHoleDescription> holes)
+            : depth(depth), holes(std::move(holes))
+    {}
 };
 
 #endif //HOLESOME_DEPTH_HOLE_LAYOUT_HPP
diff --git a/src/game/physics/holes/layouts/hole_description.hpp b/src/game/physics/holes/layouts/hole_description.hpp
index f58c230..fdbaa0e 100644
--- a/src/game/physics/holes/layouts/hole_description.hpp
+++ b/src/game/physics/holes/layouts/hole_description.hpp
@@ -4,6 +4,8 @@
 
 #include <SFML/System/Vector2.hpp>
 #include "../../../player/player.hpp"
+#include "../../../../utilities/vector_utils.hpp"
+#include "depth_hole_description.hpp"
 
 struct HoleDescription
 {
@@ -19,6 +21,21 @@ struct HoleDescription
         auto world3d = player->coordinates->world();
         worldPosition = sf::Vector2f(world3d.x, world3d.y);
     }
+
+    [[nodiscard]] DepthHoleDescription atDepth(float depth) const
+    {
+        auto closestPointAtDepth = CoordinateTransformer::closestWorldPointAtDepth(depth, worldPosition);
+        auto distance = length(worldPosition - closestPointAtDepth);
+        if (distance > radius)
+        {
+            // No hole at this depth
+            return DepthHoleDescription(playerId, 0.f, 0.f);
+        }
+
+        float chordLength = 2.f * std::sqrt(radius * radius - distance * distance);
+
+        return DepthHoleDescription(playerId, closestPointAtDepth.x, chordLength);
+    }
 };
 
 
diff --git a/src/game/physics/holes/layouts/hole_layout.cpp b/src/game/physics/holes/layouts/hole_layout.cpp
index 30d73fa..3091621 100644
--- a/src/game/physics/holes/layouts/hole_layout.cpp
+++ b/src/game/physics/holes/layouts/hole_layout.cpp
@@ -35,3 +35,13 @@ void HoleLayout::lateUpdate()
 HoleLayout::HoleLayout()
         : currentHoles(), previousHoles()
 {}
+
+DepthHoleLayout HoleLayout::atDepth(float depth) const
+{
+    std::vector<DepthHoleDescription> depthHoles{};
+    for (const auto &hole: currentHoles)
+    {
+        depthHoles.push_back(hole.atDepth(depth));
+    }
+    return DepthHoleLayout(depth, depthHoles);
+}
diff --git a/src/game/physics/holes/layouts/hole_layout.hpp b/src/game/physics/holes/layouts/hole_layout.hpp
index 793e79f..450b09c 100644
--- a/src/game/physics/holes/layouts/hole_layout.hpp
+++ b/src/game/physics/holes/layouts/hole_layout.hpp
@@ -5,6 +5,7 @@
 #include <memory>
 #include "../../../game_object.h"
 #include "hole_description.hpp"
+#include "depth_hole_layout.hpp"
 
 class HoleLayout : public GameObject
 {
@@ -17,6 +18,8 @@ public:
 
     void clear();
 
+    DepthHoleLayout atDepth(float depth) const;
+
 private:
     static inline std::shared_ptr<HoleLayout> singletonInstance = nullptr;
 
diff --git a/src/game/player/player_collection.cpp b/src/game/player/player_collection.cpp
index e9758f4..7018075 100644
--- a/src/game/player/player_collection.cpp
+++ b/src/game/player/player_collection.cpp
@@ -28,7 +28,7 @@ std::shared_ptr<PlayerCollection> PlayerCollection::getInstance()
 void PlayerCollection::addPlayer(const std::shared_ptr<Player> &player)
 {
     newPlayerBuffer.push_back(player);
-    addChild(player);
+    addDetachedChild(player);
 }
 
 void PlayerCollection::clear()
@@ -102,7 +102,7 @@ void PlayerCollection::spawnPlayer(const std::shared_ptr<InputIdentity> &inputId
     nextSpawnPointIndex = static_cast<int>((nextSpawnPointIndex + 1) % spawnPoints.size());
 
     auto player = std::make_shared<Player>(inputIdentity, PLAYER_SKIN, spawn);
-    PlayerCollection::getInstance()->addPlayer(player);
+    addPlayer(player);
 }
 
 std::vector<std::shared_ptr<Player>> PlayerCollection::getPlayers() const
diff --git a/src/prototypes/coordinates_00.cpp b/src/prototypes/coordinates_00.cpp
new file mode 100644
index 0000000..9b931ab
--- /dev/null
+++ b/src/prototypes/coordinates_00.cpp
@@ -0,0 +1,121 @@
+#include <iostream>
+#include <Eigen/Dense>
+#include "../coordinates/translated_coordinates.h"
+
+enum CoordinateSystem
+{
+    NONE,
+    WORLD,
+    DIAGONAL,
+    ISOMETRIC
+};
+
+CoordinateSystem inputCoordinateSystem()
+{
+    while (true)
+    {
+        try
+        {
+            std::cout << "Enter coordinate system (w/d/i) or x to close: ";
+            char coordinateSystemIndicator;
+            std::cin >> coordinateSystemIndicator;
+
+            switch (coordinateSystemIndicator)
+            {
+                case 'x':
+                    std::cout << "Closing ..." << std::endl;
+                    return NONE;
+                case 'w':
+                    std::cout << "World coordinates" << std::endl;
+                    return WORLD;
+                case 'd':
+                    std::cout << "Diagonal world coordinates" << std::endl;
+                    return DIAGONAL;
+                case 'i':
+                    std::cout << "Isometric coordinates" << std::endl;
+                    return ISOMETRIC;
+                default:
+                    std::cout << "Invalid coordinate system. Try again ..." << std::endl;
+                    continue;
+            }
+        } catch (...)
+        {
+
+        }
+    }
+}
+
+std::vector<float> input3values(std::string prompt = "Enter 3 values: ")
+{
+    while (true)
+    {
+        try
+        {
+            std::vector<float> values(3);
+            std::cout << prompt;
+            std::cin >> values[0] >> values[1] >> values[2];
+            return values;
+        } catch (...)
+        {
+
+        }
+    }
+}
+
+TranslatedCoordinates worldToTranslated(std::vector<float> values)
+{
+    return TranslatedCoordinates(WorldCoordinates{values[0], values[1], values[2]});
+}
+
+TranslatedCoordinates diagonalToTranslated(std::vector<float> values)
+{
+    return TranslatedCoordinates(DiagonalWorldCoordinates{values[0], values[1], values[2]});
+}
+
+TranslatedCoordinates isometricToTranslated(std::vector<float> values)
+{
+    auto world = CoordinateTransformer::isometricToWorld(IsometricCoordinates{values[0], values[1], values[2]});
+    return TranslatedCoordinates(world);
+}
+
+void printCoordinates(TranslatedCoordinates coordinates)
+{
+    std::cout << "World coordinates (x, y, z): " << coordinates.world().x << ", " << coordinates.world().y << ", "
+              << coordinates.world().z << std::endl;
+    std::cout << "Diagonal world coordinates (horizontal, vertical, depth): " << coordinates.diagonalWorld().horizontal << ", "
+              << coordinates.diagonalWorld().vertical << ", " << coordinates.diagonalWorld().depth
+              << std::endl;
+    std::cout << "Isometric coordinates (x, y, depth): " << coordinates.isometric().x << ", "
+              << coordinates.isometric().y << ", " << coordinates.isometric().depth << std::endl;
+}
+
+int main()
+{
+    while (true)
+    {
+        CoordinateSystem coordinateSystem = inputCoordinateSystem();
+        TranslatedCoordinates translatedCoordinates = TranslatedCoordinates(WorldCoordinates{0, 0, 0});
+        switch (coordinateSystem)
+        {
+            case NONE:
+                return 0;
+            case WORLD:
+                translatedCoordinates = worldToTranslated(input3values("Enter world coordinates (x, y, z): "));
+                break;
+            case DIAGONAL:
+                translatedCoordinates = diagonalToTranslated(
+                        input3values("Enter diagonal world coordinates (horizontal, vertical, depth): "));
+                break;
+            case ISOMETRIC:
+                translatedCoordinates = isometricToTranslated(
+                        input3values("Enter isometric coordinates (x, y, depth): "));
+                break;
+        }
+        printCoordinates(translatedCoordinates);
+
+        // Wait for enter, then clear screen
+        std::cin.ignore();
+        std::cin.get();
+        std::cout << "\033[2J\033[1;1H";
+    }
+}
\ No newline at end of file
diff --git a/src/utilities/vector_utils.hpp b/src/utilities/vector_utils.hpp
index f1c8653..2b1df8d 100644
--- a/src/utilities/vector_utils.hpp
+++ b/src/utilities/vector_utils.hpp
@@ -7,7 +7,7 @@
 template<typename T>
 float length(sf::Vector2<T> v)
 {
-    return std::sqrt(v.x * v.x + v.y * v.y);
+    return std::sqrt(pow(v.x, 2) + pow(v.y, 2));
 }
 
 template<typename T>
@@ -29,4 +29,10 @@ sf::Vector2<T> abs(sf::Vector2<T> v)
     return sf::Vector2<T>(std::abs(v.x), std::abs(v.y));
 }
 
+template<typename T>
+T sum(sf::Vector2<T> v)
+{
+    return v.x + v.y;
+}
+
 #endif //HOLESOME_VECTOR_UTILS_HPP