Indeed, and all of Jeff Minter's many circular shooters.
It is, in fact, intended as a sequel to my many Microbes games, which in turn are based on an old Amiga PD game which I pinched, also called Microbes.
The last time I attempted a game in that vein, however, it was all starting to feel a little slow and dated, since the Microbes tend to sit in one place and grow, rather than come at you..
This is a more frantic version, with the enemies constantly in motion. It's certainly a lot more action packed than the Microbes games were, but .. I'm not sure if it's "Better".. It's just "Different"!!!
And that's one of the aims of AGameAWeek. Try different things, and find out first hand what does and doesn't work!!