Godot Moon Lander Player Object (GDScript)

extends KinematicBody2D

const GRAVITY = 200.0
const WALK_SPEED = 200

var playerY = 0.0
var velocity = Vector2()
var thrusterUpSFX = false
var thrusterSideSFX = false
var voice = null
var sideBoostersDisabled = false

func _fixed_process(delta):
	#print(get_node("/root/global").save_data.highscore)

	playerY = self.get_pos()[1]
	velocity.y += delta * GRAVITY

	#------------- BEGIN PLAYER CONTROL PROCESSING -----------------
	##-------- HORIZONTAL MOVEMENT --------##
	if (Input.is_action_pressed("ui_left") && sideBoostersDisabled == false):
		velocity.x = -WALK_SPEED
		get_node("rightFlames").set_hidden(true)
		get_node("leftFlames").set_hidden(false)
		if (thrusterUpSFX == false && thrusterSideSFX == false):
			voice = get_tree().get_root().get_node("Base").get_node("SamplePlayer").play("thrusters")
			thrusterSideSFX = true
	elif (Input.is_action_pressed("ui_right") && sideBoostersDisabled == false):
		velocity.x = WALK_SPEED
		get_node("leftFlames").set_hidden(true)
		get_node("rightFlames").set_hidden(false)
		if (thrusterUpSFX == false && thrusterSideSFX == false):
			voice = get_tree().get_root().get_node("Base").get_node("SamplePlayer").play("thrusters")
			thrusterSideSFX = true
	else:
		velocity.x = 0
		get_node("leftFlames").set_hidden(true)
		get_node("rightFlames").set_hidden(true)
		if (thrusterSideSFX == true):
			get_tree().get_root().get_node("Base").get_node("SamplePlayer").stop_voice(0)
			thrusterSideSFX = false

		##-------- VERTICAL MOVEMENT --------##
	if (Input.is_action_pressed("ui_up")):
		get_node("upFlames").set_hidden(false)
		if (thrusterUpSFX == false && thrusterSideSFX == false):
			voice = get_tree().get_root().get_node("Base").get_node("SamplePlayer").play("thrusters")
			thrusterUpSFX = true
		velocity.y -= 10
		if (sideBoostersDisabled == true):
			sideBoostersDisabled = false
	else:
		get_node("upFlames").set_hidden(true)
		if (thrusterUpSFX == true):
			get_tree().get_root().get_node("Base").get_node("SamplePlayer").stop_voice(0)
			thrusterUpSFX = false

	##-------- END GAME & SAVE HIGH SCORE --------##
	if (Input.is_action_pressed("ui_cancel")):
		get_node("/root/global").save(get_node("/root/global").score)
		get_tree().quit()

	var motion = velocity * delta
	move(motion)

	if (is_colliding()):
		var collider = str(get_collider())
		for i in get_tree().get_nodes_in_group('rockGround'):
			if collider == str(i):
				print("Disabling")
				sideBoostersDisabled = true
		print(sideBoostersDisabled)
		var n = get_collision_normal()
		motion = n.slide(motion)
		velocity = n.slide(velocity)
		move(motion)

func _ready():
	set_fixed_process(true)