//get player input
key_right = keyboard_check(vk_right);
key_left = -keyboard_check(vk_left);
key_jump = keyboard_check_pressed(vk_space);

//react to imput
move = key_right + key_left;

hsp = move * movespeed;

if (vsp < 10) vsp += grav;

if (place_meeting(x,y+1,obj_wall))
{
    vsp = key_jump * -jumpspeed
}

//horizontal 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;

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

y += vsp;

//animate

if (move!=0) image_xscale = move;

if (place_meeting(x,y+1,obj_wall))
{
    if (move!=0) sprite_index = spr_player_run; else sprite_index = spr_player_idle;
}
//else
//{
   if (vsp < 0) sprite_index = spr_player_jump //; else sprite_index = spr_player_fall;

   if (vsp > 0) sprite_index = spr_player_jump
//}

if(place_meeting(x,y+1,obj_wall)){
  //logic to change sprite to run or idle
}
else if (vsp<0 or vsp>0){
  //logic to change to jump
}
else{
  /*have some kind of debugging info here to detect if none of the above conditions are
  being satisfied. Maybe turn the sprite into some other sprite completely so you know
  something went wrong. That would help know what part is causing the problem.*/
}