I saw a full playthrough on a stream, i think its a really cute idea and explained really well in the opening levels. the art is really fun and very innovative idea! as improvements, i think you can make the devils push each other. this way, you can move multiple at a time, without having to move each across a long distance separately. also on the same note, the movespeed was quite slow as you know, and one of the puzzles you have to move for like 5 minutes AFTER youve worked out the solution haha :P with those changes, its a really cute game and id love to see more levels!