Like eating sawdust.
Very bland graphics. The purpose of choosing black and white over color is to accentuate subtle constrasts. There's really nothing subtle or complex about these ships, though--they're each just two or three simple flood-filled geometric shapes. Very boring.
The sounds are very harsh and grating, and the "music" seems nothing more than a manic two second loop of robot fart noises. Sound actually deserves a negative score, since playing without it is better.
Sadly, gameplay is as bland as the graphics and sound. There's little variation in enemies, and no coherence to their attacks (no formations, waves, etc.). In fact, it looks like enemy generation and behavior are both totally random. No wonder there's 70 levels--they literally design themselves!
The weapons are uninspired and sameish. They almost all are straight-shooters that can be upgraded to spraying a cone-shaped area. Definitely a case of quantity over quality.
There's really nothing to recommend this game.