I love the cute art style!
How the game could be better:
- Limit the shooting speed, so the player cant shoot infinite bullets just by clicking very fast.
- Make the bullets fly until they hit the edge of the screen. Currently they disappear when they reach the mouse pointer.
- I had an issue where I had 50 coins but couldn't purchase the damage upgrade that cost 50 coins. This could be a rounding issue if you use float or double to store the money amount.