Thank you for the amazing feedback! After playing it myself a few times I agree the balance is way off, and Mitosis is very broken xD
My plan for the minimap, and the Dungeon Map item, was to color the rooms to show what they are, and if you had cleared them, unfortunately without that functionality the item is worse than useless, as without it you can't tell which rooms you haven't been in.
I have updated the game page now, it was the one thing I wasn't able to get done last night, it was very late when I uploaded the game.