Great idea, but moving from one tile to the next was very annoying. I was pressing move like five times before he moved, because of the slow walking speed. The art was nice as well. Though, the puzzles did get a bit samey.
I also had a bug in the last level were a crate moved off centre of its tile (edge of the crate in line with edge of the grid). Normally, if I moved a crate onto a button the crate would prevent it from moving off, but because the crate was off centre it moved on top of it. I thought this was a new mechanic, but it didn't happen again when I restarted the level.