I was going to complain that it was almost impossible to get past the fourth monster, but once I did and realized that that was in fact the goal of the game, I ended up quite happy with it. It's a very, very clever mechanic and an interesting puzzle to figure out how to both keep yourself alive and do enough damage. It could be expanded, but I think it's a perfect size.
My personal strat is to try and grab the big dice + the multi hit attack. Try it out, it's p easy to survive against the third enemy if you grab the big dice after the first one, and use it to buff your healing to tank everything. After that, it's simply a matter of rerolling it, and then the game breaks in half lol.