Cool game, very creative, I don't really know why you fight rats in a rap battle, but its fun and enjoyable haha
Personally, I feel like the game is a bit easy. You can actually rush to the boss and almost face tank it by running into it because you recover so much hp during combat. Also I didnt get the bar in the bottom or what the colors or numbers meant. I noticed that my player got stronger, but I don't feel like the visual presentation or the naming indicated that enough to fully grasp what was going on.
Overall a good job tho! Was definitely entertaining!