godot improvement

extends KinematicBody2D

const SPEED = 70
const DIRS = {
    "left": Vector2(-1, 0),
    "right": Vector2(1, 0),
    "up": Vector2(0, -1),
    "down": Vector2(0, 1)
}

var movedir = Vector2(0, 0)
var spritedir = "down"

func _physics_process(delta):
    controls_loop()
    movement_loop()
    spritedir_loop()

    if is_on_wall():
        for dir in DIRS:
            var vec = DIRS[dir]
            if spritedir == dir and test_move(transform, vec):
                anim_switch("push")

    elif movedir != Vector2(0,0):
        anim_switch("walk")
    else:
        anim_switch("idle")

func controls_loop():
    var LEFT    = Input.is_action_pressed("ui_left")
    var RIGHT   = Input.is_action_pressed("ui_right")
    var UP      = Input.is_action_pressed("ui_up")
    var DOWN    = Input.is_action_pressed("ui_down")

    movedir.x = -int(LEFT) + int(RIGHT)
    movedir.y = -int(UP) + int(DOWN)

func movement_loop():
    var motion = movedir.normalized() * SPEED
    move_and_slide(motion, Vector2(0, 0))

func spritedir_loop():
    for dir in DIRS:
        var vec = DIRS[dir]
        if movedir == vec:
            spritedir = dir

func anim_switch(animation):
    var newanim = str(animation, spritedir)
    if $anim.current_animation != newanim:
        $anim.play(newanim)