Pretty nice little game, although a bit on the easy side once you have fully upgraded your main weapon (I prefer the purple laser and homing missiles).
This was also a reminder that I hate flash, though. The main thing that caused me to die was laggyness because of flash. A game this simple just shouldn't lag on a AMD64x2 4400+.
Almost makes me want to go back and play Raptor and SilkWorm (which was a FANTASTIC game, btw, background DMA floppy loading <3 - a thing the PC could never do).