Improved tutorial

hidden_coin.gd

@@ -0,0 +1,17 @@
+extends Node2D
+
+# Called when the node enters the scene tree for the first time.
+func _ready() -> void:
+	add_to_group("Hidden")
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(delta: float) -> void:
+	pass
+
+func on_contact(body: Node2D) -> void:
+	print(body)
+	$AudioStreamPlayer2D.play()
+	visible = false
+	%Player2D.coins += 1
+	await get_tree().create_timer(0.2).timeout
+	queue_free()