extends KinematicBody2D

const GRAVITY = 0.0
const WALK_SPEED = 200

var velocity = Vector2()

func _physics_process(delta):
	velocity.y += delta * GRAVITY

	if Input.is_action_pressed("ui_left"):
		velocity.x = -WALK_SPEED
	elif Input.is_action_pressed("ui_right"):
		velocity.x =  WALK_SPEED
	elif Input.is_action_pressed("ui_up"):
		velocity.y =  -WALK_SPEED
	elif Input.is_action_pressed("ui_down"):
		velocity.y =  WALK_SPEED
	else:
		velocity.x = 0
		velocity.y = 0

	# We don't need to multiply velocity by delta because "move_and_slide" already takes delta time into account.

	# The second parameter of "move_and_slide" is the normal pointing up.
	# In the case of a 2D platformer, in Godot, upward is negative y, which translates to -1 as a normal.
	move_and_slide(velocity, Vector2(0, -1))