Fix collision layers and masks

scenes/coin_machine.tscn

@@ -5,6 +5,8 @@
 [sub_resource type="BoxShape" id=1]
 
 [node name="coin_machine" type="Area"]
+collision_layer = 8
+collision_mask = 4
 script = ExtResource( 1 )
 
 [node name="CollisionShape" type="CollisionShape" parent="."]

scenes/item_holder.tscn

@@ -6,6 +6,8 @@
 [sub_resource type="SphereShape" id=4]
 
 [node name="item_holder" type="Area"]
+collision_layer = 8
+collision_mask = 4
 script = ExtResource( 2 )
 
 [node name="TriggerCollider" type="CollisionShape" parent="."]

scenes/power_station.tscn

@@ -10,6 +10,8 @@
 
 [node name="power_station" type="Area"]
 transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0 )
+collision_layer = 8
+collision_mask = 4
 script = ExtResource( 1 )
 time_to_generate = 1.0