Big issue with this is there is no challenge, complete a wave and it resets basically and doesn't get closer to the bases or faster. By 20000 pts I'd had enough I'm afraid.
Thanks for the feedback, there will be an improved version soon with increasing speed of the waves, bonus ship at 1500 points, plus an initial splash screen as a intro
Much better. More balanced and by wave 7 you're shooting to survive. The sticky bullet issue seems to have gone now too. Highscore save would be good if possible.