I absolutely love this as a concept, and the detail and ideas put into it are really fun. There are a few things that I think make this slightly lower on the scale for me:
*Some sort of upgrade buying/wave system. Later floors giving more difficult enemies. Hard to program, but would be so worth it. (Overall collected gold plus a few bonus points for completing a floor would be High Score)
*Speaking of score, it is absolutely CRIMINAL that you didn't make a leaderboard for this. (To clarify, I'm not lowering score for this in particular, I just wish that it was there)
*I wish the conversions had a little bit more to them (transfer of other elements, maybe curses you can take in the wave-based format that lower certain stats for special abilities?)
Absolutely wonderful, glad I got to see this.