This is really well done! I wasn't able to beat it, but I had a lot of fun with it! I couldn't get to the exit at the end so maybe having it marked on the map would help, but that's a nitpick.
There was also a part where one of the other monsters got stuck on a skeleton, so maybe if the other monsters can pass through them that'll keep that from happening?
I'd like to record this again to try and beat it, especially if you do end up expanding on it!