Updated power station to not use coin_machine and cleaned up some of my mess

scripts/crafting_machine.gd

@@ -5,6 +5,7 @@ export var recipes: Resource
 # Called when the node enters the scene tree for the first time.
 func _ready():
 	assert(recipes != null)
+	update_coin_machine_status()
 
 func get_craft_recipe_item():
 	var items_in_slots = [$slot_1.item_in_hold.item_type, $slot_2.item_in_hold.item_type]
@@ -37,11 +38,14 @@ func should_enable_coin_machine():
 		return false
 	return can_craft_recipe()
 
+func update_coin_machine_status():
+	$coin_machine.enabled = should_enable_coin_machine()
+	
 func _on_craft_item_holder_item_changed(item):
-	$coin_machine.enabled = should_enable_coin_machine()
-
+	update_coin_machine_status()
+	
 func _on_slot_1_item_changed(item):
-	$coin_machine.enabled = should_enable_coin_machine()
+	update_coin_machine_status()
 
 func _on_slot_2_item_changed(item):
-	$coin_machine.enabled = should_enable_coin_machine()
+	update_coin_machine_status()

scripts/power_station.gd

@@ -30,11 +30,13 @@ func collect_charges_from_station():
 	self.current_holding = 0
 	return charges_to_return
 
-func _on_coin_machine_coin_requirement_met(player):
+func on_player_interact(player) -> bool:
 	assert(player.has_method("modify_inventory"))
 	var charges = collect_charges_from_station()
-	player.modify_inventory("coins", charges)
-	if charges > 0:
-		$sounds/charge_get.play()
-	else:
+	if charges <= 0:
 		$sounds/error.play()
+		return false
+	
+	player.modify_inventory("coins", charges)
+	$sounds/charge_get.play()
+	return true