I played it till the end! It's quite enjoyable, one of the best that I've played and the puzzles are well designed. Is there only 1 ending though? I really like the mechanics while the art and sound effects are really good! It requires very high brightness to play though, so maybe you can readjust the sprites color in the future :)
Anyways, there's a sprite sorting order bug in one of the later levels(I forgot which, it's around the bottom left area) :D