The enemies stucking into you was a small bug that I thought was too fun to fix. :D
I'm glad that you liked playing! Thank you very much for the feedback! :D
It's an interesting idea, I think there are only two things missing: The first is some kind of explanation for the stats, I couldn't figure out what each one represents on my own (you can even add this to the game page). The second is to reduce the time between spawns. There are times when I sit idle, waiting several seconds for something to appear. Other than that, it's a good game and was fun to play. Congrats!
I thought I did well enough to get to stage 17, then I saw the comment below ;-; hahaha
Anyway, great game! I liked the increase in difficulty and how the asteroids seems harmless at first, but then become a big problem when they keep blocking your lasers. I would suggest just a small increase in contrast between the ships and the background. Congrats!
I think that maybe the shoot should use the mouse as target, as the ship moves very fast and not in the usual way (not move left/right, but instead turn left/right), then it's hard to hit the enemies. I tried to go slower, but I was quickly surrounded.
Apart from that, it has a good visual and it's fun. Congrats!