Major collision detection improvements, more file organization, and added key interactable

Player/Player.gd

@@ -45,13 +45,18 @@ func add_currency(amount: int) -> void:
     return
 
 
+func add_item(item: String) -> void:
+    print('%s added to inventory' % [item])
+    return
+
+
 func _on_Inventory_update_currency(amount: int) -> void:
     hud.update_currency(amount)
     return
 
 
-func _on_Hitbox_body_entered(body: Node) -> void:
-    if not 'enemies' in body.get_groups():
+func _on_hitbox_area_entered(area: Area2D) -> void:
+    if not 'enemy_hitbox' in area.get_groups():
         return
 
     if health_index != 0: