So glad you liked the game! 😊 About the lag, it can happen if the fps goes below 60 (the game isn't demanding so it could have to do with the monitor and vsync- some monitors show 59 fps for example). I've never programmed "ghosts" before and the quickest way I could think of was to save the player's coordinates on every frame. But if there is a slight fps-drop, then some positions won't be saved for the ghosts which will cause the "lag". There are better ways to do this, so I will fix it after the voting is over!