diff --git a/Assets/Prefabs/Enemy.prefab b/Assets/Prefabs/Enemy.prefab
index 0d5a9f5..5692935 100644
--- a/Assets/Prefabs/Enemy.prefab
+++ b/Assets/Prefabs/Enemy.prefab
@@ -56,7 +56,6 @@ GameObject:
   - component: {fileID: 1739635715747709762}
   - component: {fileID: 5026174633141696716}
   - component: {fileID: 8577569336777110376}
-  - component: {fileID: 4859736940813683666}
   m_Layer: 0
   m_Name: Model
   m_TagString: Enemy
@@ -129,48 +128,3 @@ MeshFilter:
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 4804673878835712602}
   m_Mesh: {fileID: 10202, guid: 0000000000000000e000000000000000, type: 0}
---- !u!61 &4859736940813683666
-BoxCollider2D:
-  m_ObjectHideFlags: 0
-  m_CorrespondingSourceObject: {fileID: 0}
-  m_PrefabInstance: {fileID: 0}
-  m_PrefabAsset: {fileID: 0}
-  m_GameObject: {fileID: 4804673878835712602}
-  m_Enabled: 1
-  m_Density: 1
-  m_Material: {fileID: 0}
-  m_IncludeLayers:
-    serializedVersion: 2
-    m_Bits: 0
-  m_ExcludeLayers:
-    serializedVersion: 2
-    m_Bits: 0
-  m_LayerOverridePriority: 0
-  m_ForceSendLayers:
-    serializedVersion: 2
-    m_Bits: 4294967295
-  m_ForceReceiveLayers:
-    serializedVersion: 2
-    m_Bits: 4294967295
-  m_ContactCaptureLayers:
-    serializedVersion: 2
-    m_Bits: 4294967295
-  m_CallbackLayers:
-    serializedVersion: 2
-    m_Bits: 4294967295
-  m_IsTrigger: 0
-  m_UsedByEffector: 0
-  m_UsedByComposite: 0
-  m_Offset: {x: 0, y: 0}
-  m_SpriteTilingProperty:
-    border: {x: 0, y: 0, z: 0, w: 0}
-    pivot: {x: 0, y: 0}
-    oldSize: {x: 0, y: 0}
-    newSize: {x: 0, y: 0}
-    adaptiveTilingThreshold: 0
-    drawMode: 0
-    adaptiveTiling: 0
-  m_AutoTiling: 0
-  serializedVersion: 2
-  m_Size: {x: 1, y: 1}
-  m_EdgeRadius: 0
diff --git a/Assets/Scripts/EnemyController.cs b/Assets/Scripts/EnemyController.cs
index d64149e..e9a9b18 100644
--- a/Assets/Scripts/EnemyController.cs
+++ b/Assets/Scripts/EnemyController.cs
@@ -4,6 +4,12 @@ public class EnemyController : OrbitalPositionBehaviour
 {
     public override void OnStart()
     {
-        m_OrbitalPosition.m_DeletedAtCentre = true;
+        transform.position = new Vector3(0, 0, -200f);
+        m_OrbitalPosition.RadiusDistance = 0.2f;
+    }
+
+    public override void OnReachCentre()
+    {
+        Destroy(gameObject);
     }
 }
diff --git a/Assets/Scripts/OrbitalPosition.cs b/Assets/Scripts/OrbitalPosition.cs
index dd573ba..e261acf 100644
--- a/Assets/Scripts/OrbitalPosition.cs
+++ b/Assets/Scripts/OrbitalPosition.cs
@@ -7,16 +7,17 @@ public class OrbitalPosition
     public Int64 pRing = 0;
     public float DistanceFromCentre = 0;
     public float RadiusDistance = 0;
+    public float ObjectRadius = 0.1f;
 
-    public Transform owner = null;
+    public OrbitalPositionBehaviour Behaviour;
+    public Transform Owner = null;
 
-    public int m_SpinSpeed = 1;
-    public bool m_DeletedAtCentre = false;
+    public int SpinSpeed = 1;
 
     public OrbitalPosition(GameObject _owner)
     {
         pRing = GlobalOrbitalPositionManager.LastRingID;
-        owner = _owner.transform;
+        Owner = _owner.transform;
     }
 
     public Vector3 TranslateToVec3() => new
@@ -38,6 +39,9 @@ public class GlobalOrbitalPositionManager : MonoBehaviour
     private readonly List<Ring> m_Rings = new();
     private readonly Dictionary<Int64, float> m_Distances = new();
 
+    private OrbitalPosition m_PlayerOrbitalPosition;
+    public static void SetPlayer(OrbitalPosition player) => s_Instance.m_PlayerOrbitalPosition = player;
+
     private float m_TimeOfLastRingSpawn = float.NegativeInfinity;
 
     private Int64 m_LastGeneratedRing = 0;
@@ -69,7 +73,7 @@ public class GlobalOrbitalPositionManager : MonoBehaviour
         s_Instance.m_PrecalculatedPositions[CIRCLE_POINTS] = s_Instance.m_PrecalculatedPositions[0];
     }
 
-    public void Update()
+    private void Update()
     {
         if (Time.time - m_TimeOfLastRingSpawn > GlobalOrbitalSettings.GapDistance)
         {
@@ -130,12 +134,7 @@ public class GlobalOrbitalPositionManager : MonoBehaviour
         {
             if (!m_Distances.ContainsKey(orbitalPosition.pRing))
             {
-                if (orbitalPosition.m_DeletedAtCentre)
-                {
-                    Destroy(orbitalPosition.owner.gameObject);
-                    continue;
-                }
-
+                orbitalPosition.Behaviour.OnReachCentre();
                 orbitalPosition.pRing = m_LastGeneratedRing;
             }
 
@@ -143,7 +142,26 @@ public class GlobalOrbitalPositionManager : MonoBehaviour
             orbitalPosition.DistanceFromCentre = distance;
             orbitalPosition.RadiusDistance = (orbitalPosition.RadiusDistance + (Time.deltaTime * GlobalOrbitalSettings.RadiusSpeed)) % (Mathf.PI * 2);
 
-            orbitalPosition.owner.position = orbitalPosition.TranslateToVec3();
+            orbitalPosition.Owner.position = orbitalPosition.TranslateToVec3();
+        }
+    }
+
+    private void FixedUpdate()
+    {
+        foreach (OrbitalPosition orbital in m_ObjectInstances)
+        {
+            if (orbital == m_PlayerOrbitalPosition)
+                continue;
+
+            Vector2 a = orbital.TranslateToVec3();
+            Vector2 b = m_PlayerOrbitalPosition.TranslateToVec3();
+            float distance = (a - b).magnitude;
+            float radii = orbital.ObjectRadius + m_PlayerOrbitalPosition.ObjectRadius;
+            if (distance < radii)
+            {
+                orbital.Behaviour.OnCollision(m_PlayerOrbitalPosition.Behaviour);
+                m_PlayerOrbitalPosition.Behaviour.OnCollision(orbital.Behaviour);
+            }
         }
     }
 
@@ -160,9 +178,12 @@ public abstract class OrbitalPositionBehaviour : MonoBehaviour
 
     private void Start()
     {
-        m_OrbitalPosition = new OrbitalPosition(gameObject);
-        GlobalOrbitalPositionManager.RegisterOrbitalPositionInstance(m_OrbitalPosition);
+        m_OrbitalPosition = new OrbitalPosition(gameObject)
+        {
+            Behaviour = this
+        };
 
+        GlobalOrbitalPositionManager.RegisterOrbitalPositionInstance(m_OrbitalPosition);
         OnStart();
     }
 
@@ -170,4 +191,8 @@ public abstract class OrbitalPositionBehaviour : MonoBehaviour
         GlobalOrbitalPositionManager.UnregisterOrbitalPositionInstance(m_OrbitalPosition);
 
     public virtual void OnStart() { }
+
+    public virtual void OnReachCentre() { }
+
+    public virtual void OnCollision(OrbitalPositionBehaviour other) { }
 }
diff --git a/Assets/Scripts/PlayerController.cs b/Assets/Scripts/PlayerController.cs
index 00cfd27..7582829 100644
--- a/Assets/Scripts/PlayerController.cs
+++ b/Assets/Scripts/PlayerController.cs
@@ -2,12 +2,12 @@ using UnityEngine;
 
 public class PlayerController : OrbitalPositionBehaviour
 {
-    float m_StartPosition;
     public GameObject m_EnemyPrefab;
 
     public override void OnStart()
     {
-        m_OrbitalPosition.DistanceFromCentre = m_StartPosition;
+        GlobalOrbitalPositionManager.SetPlayer(m_OrbitalPosition);
+        m_OrbitalPosition.RadiusDistance = 0.4f;
     }
 
     public void Update()
@@ -22,4 +22,9 @@ public class PlayerController : OrbitalPositionBehaviour
             Instantiate(m_EnemyPrefab);
         }
     }
+
+    public override void OnCollision(OrbitalPositionBehaviour other)
+    {
+        Debug.Log("HIT OBSTACLE IG");
+    }
 }
diff --git a/ProjectSettings/TimelineSettings.asset b/ProjectSettings/TimelineSettings.asset
new file mode 100644
index 0000000..b21943a
--- /dev/null
+++ b/ProjectSettings/TimelineSettings.asset
@@ -0,0 +1,16 @@
+%YAML 1.1
+%TAG !u! tag:unity3d.com,2011:
+--- !u!114 &1
+MonoBehaviour:
+  m_ObjectHideFlags: 53
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 0}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: a287be6c49135cd4f9b2b8666c39d999, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
+  assetDefaultFramerate: 60
+  m_DefaultFrameRate: 60