diff --git a/src/DtsObject.hx b/src/DtsObject.hx
index d51100cd..e7965c87 100644
--- a/src/DtsObject.hx
+++ b/src/DtsObject.hx
@@ -1545,6 +1545,8 @@ class DtsObject extends GameObject {
 	public override function dispose() {
 		super.dispose();
 		this.level = null;
+		boundingCollider = null;
+		colliders = null;
 		this.dtsResource.release();
 	}
 }
diff --git a/src/Marble.hx b/src/Marble.hx
index 771d4f05..d53d5024 100644
--- a/src/Marble.hx
+++ b/src/Marble.hx
@@ -449,8 +449,7 @@ class Marble extends GameObject {
 
 			if (isUltra) {
 				this.rollMegaSound = AudioManager.playSound(ResourceLoader.getResource("data/sound/mega_roll.wav", ResourceLoader.getAudio,
-					this.soundResources), this.getAbsPos().getPosition(),
-					true);
+					this.soundResources), this.getAbsPos().getPosition(), true);
 				this.rollMegaSound.volume = 0;
 			}
 
@@ -2123,5 +2122,8 @@ class Marble extends GameObject {
 		if (this.helicopterSound != null)
 			this.helicopterSound.stop();
 		super.dispose();
+		removeChildren();
+		camera = null;
+		collider = null;
 	}
 }
diff --git a/src/MarbleWorld.hx b/src/MarbleWorld.hx
index 2b0699e6..1901127b 100644
--- a/src/MarbleWorld.hx
+++ b/src/MarbleWorld.hx
@@ -1843,8 +1843,9 @@ class MarbleWorld extends Scheduler {
 
 		if (sky != null)
 			sky.dispose();
-
+		sky = null;
 		instanceManager = null;
+		collisionWorld.dispose();
 		collisionWorld = null;
 		particleManager = null;
 		namedObjects = null;
diff --git a/src/collision/CollisionEntity.hx b/src/collision/CollisionEntity.hx
index 136704b9..7209bf7e 100644
--- a/src/collision/CollisionEntity.hx
+++ b/src/collision/CollisionEntity.hx
@@ -71,6 +71,15 @@ class CollisionEntity implements IOctreeObject implements IBVHObject {
 		// this.bvh.build();
 	}
 
+	public function dispose() {
+		for (s in this.surfaces)
+			s.dispose();
+		go = null;
+		surfaces = null;
+		bvh = null;
+		octree = null;
+	}
+
 	public function setTransform(transform:Matrix) {
 		if (this.transform.equal(transform))
 			return;
diff --git a/src/collision/CollisionSurface.hx b/src/collision/CollisionSurface.hx
index 28f24471..e9237988 100644
--- a/src/collision/CollisionSurface.hx
+++ b/src/collision/CollisionSurface.hx
@@ -151,4 +151,15 @@ class CollisionSurface implements IOctreeObject implements IBVHObject {
 			n: _transformedNormals[p1]
 		};
 	}
+
+	public function dispose() {
+		points = null;
+		normals = null;
+		indices = null;
+		_transformedPoints = null;
+		_transformedNormals = null;
+		edgeData = null;
+		edgeConcavities = null;
+		originalIndices = null;
+	}
 }
diff --git a/src/collision/CollisionWorld.hx b/src/collision/CollisionWorld.hx
index 31923ade..28988fc0 100644
--- a/src/collision/CollisionWorld.hx
+++ b/src/collision/CollisionWorld.hx
@@ -131,4 +131,18 @@ class CollisionWorld {
 			this.dynamicOctree.update(entity);
 		}
 	}
+
+	public function dispose() {
+		for (e in entities) {
+			e.dispose();
+		}
+		for (e in dynamicEntities) {
+			e.dispose();
+		}
+		octree = null;
+		entities = null;
+		dynamicEntities = null;
+		dynamicOctree = null;
+		dynamicEntitySet = null;
+	}
 }