platform | check points | gml

objCheckpoint Step event:

if place_meeting(x,y,objPlayer){
  objPlayer.checkpoint_x = x;
  objPlayer.checkpoint_y = y;
  instance_destroy(); // remove checkpoint flag
}

// ^ could also replace checkpoint flag sprite

objPlayer Create event:

// player checkpoint variables:

checkpoint_x = x;
checkpoint_y = y;

objPlayer Step event:

// restart player at most recent checkpoint,
// depending on how player has died:

if (dead){
	x = checkpoint_x;
    y = checkpoint_y;
}