There's a lot of good stuff going on here. The level design is pretty good and the upgrades are fun. The slime travel system was a cool idea. There are lots of health boosts to make the gameplay fair. My main criticism is that there's something weird going on with the controls. For reasons I could not figure out, every few jumps, the character would only jump a tiny bit, like they were hitting their head on a ceiling. The inconsistency here made me stop playing before I reached the end.