For me the movement and the difficulty are big reasons why I was engaged (I played until stage 14 and would have continued if i didnt rage quit and lose all my progress...)
During my game time, I haven't felt tired of the curses/blessings and was still trying to play around them to get better, it's a kind of a rare game experience so I loved it.
I think you have something here, and you obviously got more ideas you can play with, im not sure what you mean by the combat arenas but you're already cooking. Anyway whatever you do you guys are talented AF and im glad you're making games