+1 to what skykone mentioned about the dice screen, that's something that will need some testing and probably bugfixing, specially the part where the values don't revert back to the defaults.
It's fine that so many enemies spawn, but you can just outrun them. I'd make it so you run at the same speed or a bit more but not much of a difference, so it made dodging a bit harder, and not so easy to outpace them. The health they have, for a starting area it can be too much specially with that many enemies.
The game aims automatically, so basically all you do is to move around and let it shoot, but this causes a issue when enemies stack, you don't know what you are hitting, and you might have too many enemies sitting at just 1hp (or one hit from dying) but you have no way to aim at (or priorize) them. The enemy variety and the game mechanics are fine overall, though.
It's a cool idea and it's fun, but it needs some polishing, keep it up!
Cheers :D