godot, move charater, character controller, top down, shoot bullet

player.gd

extends CharacterBody2D

@onready var bullet_spawn_point: Marker2D = $BulletSpawnPoint

@onready var bullet = preload("res://bullet.tscn")
var speed: int = 75
var direction: Vector2 = Vector2()
func _physics_process(delta: float) -> void:
	var input_dir = Vector2(Input.get_axis("ui_left", "ui_right"), Input.get_axis("ui_up", "ui_down")).normalized()
	
	if input_dir.x > 0:
		get_node("Player").frame = 1
		get_node("Player").flip_h = false
		direction = input_dir
	elif input_dir.x < 0:
		get_node("Player").frame = 1
		get_node("Player").flip_h = true
		direction = input_dir
	elif input_dir.y > 0:
		#down
		get_node("Player").frame = 0
	
		direction = input_dir
	elif input_dir.y < 0:
		#up
		get_node("Player").frame = 2
		direction = input_dir
	bullet_spawn_point.position = direction*5
	if Input.is_action_just_pressed("Shoot"):
		var bullet_temp = bullet.instantiate()
		
		if not direction:
			direction.y = 1
		bullet_temp.velocity = direction * 100
		bullet_temp.global_position = bullet_spawn_point.global_position
		get_node("Bullets").add_child(bullet_temp)
		
	velocity = input_dir * speed
	move_and_slide()