First of all: Congratz for finishing the jam and submitting a playable game. I really like the art and the general visual style of the game as well as the visual design of the enemies. The base mechanic that incoorperates the game theme is cool. The music is also fitting. :D
However the base mechanic gets very repetitive really fast, since the only interaction is to spin the wheel and buy some upgrades as soon as you got the money. It would be nice to have some additional mechanic that doesn't completely rely on chance. Because to keep a game interesting a good mix between those two elements often helps.
Also it doesn't feel very threatening to be defeated since you just fight the same enemy with full life again. The other way around would probably just be frustrating though, since you have zero control over the outcomes apart from what you upgrade. So this also falls more or less into the point I made before.
I also noticed the music sometimes was lagging in full screen mode, which made it much more enjoyable to play in the small window. Don't know what caused that.
Still a cool game for the seven day window of the jam. I couldn't find any bugs or stuff like that apart from the audio one. Keep it up. :)