Oh, I didn't understand that you got more enemies the higher you roll. I thought the spaces had random "encounters" so you fought what you landed on, if that makes sense.
Nice take on health, but it does mean you don't change weapons if you avoid getting hit, which kinda lowers the variety. I'd rather health was only moving backwards and the weapons changed when you rolled, so each "room" has random enemies and weapons. I don't know, just thinking out loud I guess.