Nice game. I was clicking like mad to clear out the enemies. How do you upgrade though? It wasn't clear to me how to improve my abilities as some extra fire-rate would have been awesome. Managed to get about 100 points or thereabouts before I got overwhelmed! I liked the sound effects you used and even though they are simple they are still better than most games I've played in the jam. I had a lot of fun with this and played it more than once, which is how you know you're on to something good. Nice work and well done.