Change animation speed

extends Node2D

onready var anim: = $AnimationPlayer

const slow: = 1.0
const fast: = 2.0

func _input(event:InputEvent)->void:
    if event is InputEventMouseButton:
        if event.button_index == 1:
            if event.pressed:
                anim.playback_speed = fast
            else:
                anim.playback_speed = slow