added more sounds and autocollect coin

scripts/items/fireball.gd

@@ -1,10 +1,12 @@
 extends RigidBody2D
 @onready var timer = $Timer
 var enter_count = 0
+@onready var audio_stream_player_2d = $AudioStreamPlayer2D
 
 # Called when the node enters the scene tree for the first time.
 func _ready():
 	timer.start()
+	audio_stream_player_2d.play()
 
 # Called every frame. 'delta' is the elapsed time since the previous frame.
 func _process(delta):