This was really fun to play. Good job with the fly characters, they're super annoying which just makes you want to punch them even more. This was really well put together. If I can add a bit of constructive criticism for a future update, I would suggest making it more clear that you're being blocked from progressing until you've cleared an area. I thought I was getting stuck on something until I figured out that it was intentionally keeping me from continuing until I killed something else. Hard to find anything else to offer as a suggested improvement. This was great overall.