This is a really good basis for a geometry wars style roguelike. Really like it overall especially the fleshed out upgrade system. Here are a few points where I see room to improve:
- Pressing numbers is a bit cumbersome with WASD. Maybe use the scroll wheel?
- enemy healthbar too small. Maybe use the body as a health indicator?
- Please add more satisfying projectile impact effect both visually and sound wise.
- Would have liked it to start off with mono colored waves to teach the concept. First enemies should die faster (one hit?)
- I would have liked the player and enemies being a bit smaller so that there's more room to navigate