Interesting game! I enjoyed being able to play with so many stats before entering into a boss battle. It fits the theme very cleanly with gaining less if you go in with more.
If you wanted to improve, I suggest not having the shop available until at least one boss is defeated. First time playing I bought something and didn't have the funds to go into the boss battle.
A bug I found: If you are decrease a stat all the way until you have 0 then try to add some back, regardless of how much of a buffer you should have, you will still be shown as loosing money.
Overall, a really fun game!