This one was pretty cool - the aesthetics were on point, and gave me that same grungy feel stuff like Buckshot Roulette gives. I could see this making a really good lil' game experience like that, and the core loop is fairly solid. I feel like it could be refined even further by having a "turn based" mechanic - some kind of adversary you have to beat, maybe, instead of just "number go up". It's where games like that excel - you're fighting for a goal, risking it all against a threat or adversary, and it adds to the stakes.
Sound design was minimal, but I felt like that added to the stress. The only thing maybe would be tweaking the flow and speed of camera movements when heading to the score/heart menu, to really make gameplay feel quick and snappy.
This game has some good foundation, and you could definitely make something good from here.