I can hear rain and thunder, but I can see no sky, this level would go well with some open air segments. The majority of the level had solid platforming but it felt really tight and corridor-esque, which is not quite what I would expect from a swamp. I enjoyed the mushroom hops, but the edges of some of them don't cause a spring up, which I found a bit irritating, I'm not sure whether or not you tagged them properly, but you should take a look(Specifically the second act's mushroom path). In the lazer room, if you somehow screw up while in a tight space, you end stuck in the painstate due to a bug unless you drop off, which is either onto a small platform if you're lucky , or the goop below. Act 2's boss was good in concept, but he doesn't retreat at all when hit, so you can quickly spam jumps and kill him once you get high enough. I had no problems with him at all on my first attempt, I didn't even get hit. I would rather see Eggman rise up a bit over the player after he's hit instead of continuing towards him at his max height.