Generally very enjoyable and well put together, but it's suffering from the same problem that I've seen in so many other games already: it's a highscore game, but as long as you are patient you basically can't lose. You can math the shooting button and it will get rid of astroids in front of you pretty reliably. Why would I want a speed upgrade for my ship? Moving faster is risky and has no benefit. Just give me a timer to add some pressure and the score is instantly something you can compete for and not just a test of patience :)