pretty interesting to have it all be generated. Not sure how many variations there are though, as I seemed to get a lot of bosses with similar structures and the AI doesn't seem to get affected by the seed (retries with the same seed resulted in different starts).
I'm also not a big fan of the teleport. It isn't really telegraphed where it will go to so you sometimes find it teleporting right next to you and killing you before you had a chance to react. Otherwise, a fun game though :)