Physics are pretty janky... if you're supposed to be getting around the map by slingshotting yourself along walls, I have to see it feels more like an exploit than a mechanic. It would be good to teach the player exactly how you want them to use the grappling hook, whether explicitly or implicitly, to make it less frustrating, unless that's what you're going for. Enemy death animation is nice, although gravity for the blobs is broken and it's annoying to die to them and have to start the level again. Some potential in this though.