Very good graphics and music! This definitely fits in with the theme.
Unfortunately, I believe I found several bugs.
- Going back to the title screen while the slots were spinning caused the slot sound to keep playing until the slots were spun again.
- I sometimes found that I wasn't able to buy items in the shop, even if I had enough money for them. This may be because I gained money from the slot machine after the round was over, but the shop didn't update which items could be purchased. However, I also encountered this when I had exactly 25 coins and didn't use the slots.
- I'm not sure that things purchased in the shop, specifically the faster and larger bow upgrades, actually had an effect the next round.
- I don't think that the bow's hitbox was updated when it grew, which caused the arrow to pass through it.
Great work!