Delta Time Platformer

///Movement

global.delta = delta_time / ((1/room_speed)*1000000);

// Get input
keyboard_set_map(ord("W"), vk_up);
keyboard_set_map(ord("A"), vk_left);
keyboard_set_map(ord("D"), vk_right);

key_right = keyboard_check(vk_right);
key_left = -keyboard_check(vk_left);
key_jump += buffer*keyboard_check_pressed(vk_up);
if key_jump > 0 key_jump--;

move = key_left + key_right;
if move != 0 //Accelerating
{
    dir = move;
    hsp = (lerp(hsp,move * spd, 0.2)*global.delta);
}
else hsp = (lerp(hsp,move * spd,0.1)*global.delta); //Decelerating


if vsp < 10 vsp += grav*global.delta;

if place_meeting(x, y + 1, obj_wall) //If on ground
{
    if key_jump > 0
    {
        vsp = sign(key_jump) * -jspd * global.delta;
        key_jump = 0;
    }
}

//Collisions
if place_meeting(x + hsp, y, obj_wall)
{
    while (!place_meeting(x+sign(hsp),y, obj_wall))
    {
        x += sign(hsp);
    }
    hsp = 0;
}
x += hsp;

if place_meeting(x, y + vsp, obj_wall)
{
    while !place_meeting(x, y + sign(vsp), obj_wall)
    {
        y += sign(vsp);
    }
    vsp = 0;
}
y += vsp;

//Clamp in room
x = clamp(x,sprite_width/2,room_width-(sprite_width/2));
y = clamp(y,sprite_height/2,room_height-(sprite_height/2));