This is a very nice experience! Great idea with the theme! Sound effects and music are great, movement fits well, shooting feels shockingly responsive, power ups are creative, and the implementation of bartering with the demon feels great! I'd just try to cut down on text a little bit and maybe make the health a little bit less, as my first round was *really* just long, and this kind of gameplay I personally feel works best in 20-30 second bursts. Fantastic job!