diff --git a/behaviours/collectable.tscn b/behaviours/collectable.tscn
index d9cfe9b..82d564c 100644
--- a/behaviours/collectable.tscn
+++ b/behaviours/collectable.tscn
@@ -9,6 +9,8 @@ radius = 16.0
 script = ExtResource("1_p0pc3")
 
 [node name="MouseArea" type="Area2D" parent="."]
+collision_layer = 0
+collision_mask = 0
 monitorable = false
 
 [node name="Shape" type="CollisionShape2D" parent="MouseArea"]
diff --git a/behaviours/draggable.tscn b/behaviours/draggable.tscn
index 6750bf5..24c8ffc 100644
--- a/behaviours/draggable.tscn
+++ b/behaviours/draggable.tscn
@@ -7,6 +7,8 @@
 radius = 8.0
 
 [node name="Draggable" type="Area2D"]
+collision_layer = 0
+collision_mask = 0
 script = ExtResource("1_hdedq")
 
 [node name="Shape" type="CollisionShape2D" parent="."]
diff --git a/behaviours/hover_detector.tscn b/behaviours/hover_detector.tscn
index 04097d6..d79fa3e 100644
--- a/behaviours/hover_detector.tscn
+++ b/behaviours/hover_detector.tscn
@@ -6,6 +6,8 @@
 radius = 8.0
 
 [node name="HoverDetector" type="Area2D"]
+collision_layer = 0
+collision_mask = 0
 monitorable = false
 script = ExtResource("1_51m5p")
 
diff --git a/behaviours/hunter.tscn b/behaviours/hunter.tscn
index f206d8c..42fcfc7 100644
--- a/behaviours/hunter.tscn
+++ b/behaviours/hunter.tscn
@@ -9,6 +9,9 @@ radius = 100.0
 script = ExtResource("1_3bmd5")
 
 [node name="DetectionArea" type="Area2D" parent="."]
+collision_layer = 0
+collision_mask = 24
+monitorable = false
 
 [node name="Shape" type="CollisionShape2D" parent="DetectionArea"]
 shape = SubResource("CircleShape2D_kxb8e")
diff --git a/behaviours/move_towards_target.tscn b/behaviours/move_towards_target.tscn
index 0a18f6e..433b6e8 100644
--- a/behaviours/move_towards_target.tscn
+++ b/behaviours/move_towards_target.tscn
@@ -1,4 +1,4 @@
-[gd_scene load_steps=3 format=3 uid="uid://c7b4v6h7a3dy6"]
+[gd_scene load_steps=3 format=3 uid="uid://kceb2v2dm0qn"]
 
 [ext_resource type="Script" path="res://behaviours/move_towards_target.gd" id="1_703gy"]
 [ext_resource type="PackedScene" uid="uid://cbg5kgwxusvxf" path="res://behaviours/hover_detector.tscn" id="2_nq6qb"]
@@ -7,6 +7,7 @@
 script = ExtResource("1_703gy")
 
 [node name="CaptureArea" parent="." instance=ExtResource("2_nq6qb")]
+collision_mask = 24
 
 [connection signal="mouse_entered" from="CaptureArea" to="." method="_on_capture_area_mouse_entered"]
 [connection signal="mouse_exited" from="CaptureArea" to="." method="_on_capture_area_mouse_exited"]
diff --git a/behaviours/spawner.gd b/behaviours/spawner.gd
new file mode 100644
index 0000000..13a0411
--- /dev/null
+++ b/behaviours/spawner.gd
@@ -0,0 +1,18 @@
+extends Node2D
+class_name Spawner
+
+signal spawned(entity: Node2D)
+
+@export var scene: PackedScene
+@export var parent: Node2D
+
+func spawn():
+	var entity = scene.instantiate()
+	entity.global_scale = global_scale
+	entity.global_position = global_position
+	entity.global_rotation = global_rotation
+	parent.add_child(entity)
+
+func _ready():
+	if parent == null:
+		parent = MainGame.get_ancestor(self).get_node("SpawnedEntities")
diff --git a/behaviours/spawner.tscn b/behaviours/spawner.tscn
new file mode 100644
index 0000000..2154f4a
--- /dev/null
+++ b/behaviours/spawner.tscn
@@ -0,0 +1,6 @@
+[gd_scene load_steps=2 format=3 uid="uid://cyrg770fsetyu"]
+
+[ext_resource type="Script" path="res://behaviours/spawner.gd" id="1_b4uk0"]
+
+[node name="Spawner" type="Node2D"]
+script = ExtResource("1_b4uk0")
diff --git a/entities/sheep.tscn b/entities/sheep.tscn
index bca940d..56d1ffe 100644
--- a/entities/sheep.tscn
+++ b/entities/sheep.tscn
@@ -10,6 +10,8 @@ radius = 16.0
 [sub_resource type="PlaceholderTexture2D" id="PlaceholderTexture2D_08frh"]
 
 [node name="Sheep" type="CharacterBody2D"]
+collision_layer = 8
+collision_mask = 14
 script = ExtResource("1_4dmll")
 
 [node name="Shape" type="CollisionShape2D" parent="."]
diff --git a/project.godot b/project.godot
index 804c00b..4d6dda9 100644
--- a/project.godot
+++ b/project.godot
@@ -33,6 +33,16 @@ main_menu={
 ]
 }
 
+[layer_names]
+
+2d_physics/layer_1="Unset"
+2d_physics/layer_2="Tiles"
+2d_physics/layer_3="Trees"
+2d_physics/layer_4="Entities (grounded)"
+2d_physics/layer_5="Entities (air)"
+2d_physics/layer_6="Pickups"
+2d_physics/layer_7="System"
+
 [physics]
 
 common/physics_ticks_per_second=100
diff --git a/scenes/game/cursor_magnet.tscn b/scenes/game/cursor_magnet.tscn
index c262ae5..05866a1 100644
--- a/scenes/game/cursor_magnet.tscn
+++ b/scenes/game/cursor_magnet.tscn
@@ -7,6 +7,8 @@
 radius = 16.0
 
 [node name="CursorMagnet" type="Area2D"]
+collision_layer = 64
+collision_mask = 8
 script = ExtResource("1_xk040")
 
 [node name="Shape" type="CollisionShape2D" parent="."]
diff --git a/scenes/game/main_game.tscn b/scenes/game/main_game.tscn
index 543c167..7ee58c3 100644
--- a/scenes/game/main_game.tscn
+++ b/scenes/game/main_game.tscn
@@ -66,3 +66,5 @@ position = Vector2(-135, -134)
 
 [node name="Sheep2" parent="." instance=ExtResource("5_63bwb")]
 position = Vector2(-462, -77)
+
+[node name="SpawnedEntities" type="Node2D" parent="."]