Overall really like the concept super simple really easy to pick up and play. Fits the theme well. The sprites were really clean I think that some extra game feel things would be nice though like particle effects when objects collide with the slime. Maybe make the slime animate depending on what hits or by the amount of health left. The game doesn't seem to have any audio which could really add to the feel once again. I think with some audio and some of those effects would make this a really satisfying game to play. Solid submission! :D
If you have time and could check out my submission I would really appreciate it!