Super fun game, thanks for making it! I am really enjoying the current version (1.1.18). For me the balance is in a very good place (in the sense that it feels quite consistent to full clear if I don't make silly mistakes, but there are still challenging problems to solve).
I would really enjoy a "countdown" setting (so that the numbers on empty tiles show "total adjacent power - sum of adj. visible monsters - sum of adj. user markings"), just to ease the burden of the arithmetic.