Fun little game, reminded me of Pegglin :D congrats on being able to finish the game !
Maybe after the jam you could add the audio and add some cool particle effects or something to improve the game feel ! Also something that explains what each ball does or some sprites for the balls/shop, it would really improve readability on what you own and what you can use. I didn't really understand the point of spinning the chambers but maybe that's just me. Good work !