good puzzle game! very simple and polished presentation.
I'd like the movement to be a bit more responsive, sometimes I'll press when I think I'm on the next tile and will just stop. would be good to add a little wider of a window where you can start pressing the keys and store the input. That and being able to hold to move multiple in a row would be great for the controls and make this game feel as polished as it looks. great job NILS!