I quickly came to the same tactic as deusalgor. This completely circumvents what I think is the meat of the game, dodging your own bullets.

The music is fully panned left, that's a no-no for headphone users.

Really fun game.
In contrary to Coppyhop statement I used this tactic: collect as many enemies on map as you can and just shoot all of them in one spam attack.
IDK if you really need to fix that, but as an option: give cooldown for attacks and linear speed increase for enemies.

Puh, that was intense.  Spent twenty mins on it  trying to beat your score. Finally found the good ol' spam tactic :)

Simple game but well done - fits nicely with the themes.

I honestly was quite impressed, though in all honesty it was easiest to just spam shots and play a dodging game, you could easily rack up points by just dodging for a while and letting the enemies run into the bullets that are already there, maybe add an incentive to actually shoot the enemies?