Nice puzzle game! I liked the slime's look and animations. Visually the game was very clear, which I appreciate. Would've been nice to see more in the non-play area than just hundreds of gray tiles.
Music was decent, but I found the jumping sound rather annoying.
I wish there were more "actual" puzzles, it was mostly a tutorial and the last level was the only one where I had to think a little bit. It's a very good basis for a bigger game though!