player.gd

extends KinematicBody2D

const ACCEL = 1500
const MAX_SPEED = 500
const FRICTION = -500
const GRAV = 1000

var acc = Vector2()
var vel = Vector2()

func _ready():
	set_fixed_process(true)
	
func _fixed_process(delta):
	acc.y = GRAV
	acc.x = Input.is_action_pressed("ui_right") - Input.is_action_pressed("ui_left")
	acc.x *= ACCEL
	if acc.x == 0:
		acc.x = vel.x * FRICTION * delta
	vel += acc * delta
	vel.x = clamp(vel.x, -MAX_SPEED, MAX_SPEED)
	
	move(vel * delta)