I like the concept, but at this point it's very repetitive.
Disclaimer, This time around i cheated because i was tired of losing every few levels and having to restart, which seems to be the operational intention of the game. So i wanted to see if i was missing something by dying every 4-5 levels and having to restart.
Answer is no. It just endlessly adds more levels, and worse; if there is a transformation set you don't like, like, beast, goblin or slime, whatever; you will beat levels and only have the option to transform into one of those or stay human, even if you were already demon transformed...
I wish you could keep your demon transformation and build on it. I also wish there were cardsets to transform your opponents into your phenotype, and possibly keep them as pets or harem, etc in a 'camp' or something.
Knocking them up with your futa dick and having kids which grow up to become players on your team or something would add a deeper immersion to the game, and also add depth to the gameplay if you breed them for stats or something.