needs some finetuning
You've got quite a good game on your hands, yet there are some things that still need taking care of. First of all, the top-left boundaries aren't there (you can practically fly off-screen as far as possible). The collision detection isn't the best I've seen either. And after 50,000 points, nothing happened. Another bad was the overlooping music, making it is cluster of mangled beats and sounds.
I know I might sound negative, but if you can manage to straighten things out, you've got a good space shooter on your hands.