OK, I just played through this, and there's a few things I need to tell you.
1. Maybe I'm just terrible at your mod, but I can't figure out where to go in the first act at all. If you don't want to, you can just ignore this bit, but if you could, some kind of way to tell where you're going would be nice. It doesn't have to be a hold-forward speedfest, but some arrows or something would be a big help.
2. The enemies. I do not like your choice of enemies. The enemy you use the most is incredibly annoying, since it's so fast and you can't hit it from the side, which I use the most to kill enemies because jumping on them is kind of inaccurate. Please, just use Crawlas. Red Crawlas, even, if you have to.
3. You need to surround more of the level with walls, because the way things are now makes a lot of HOM effects and makes it harder to find where you need to go.
I can't even beat the 1st act as it is. Maybe I'm just that bad. But, PLEASE, try to fix this, and if you can't, give me a good reason why.