Use WASD to move, and the mouse to fire projectiles. There are two enemies: the smaller ones, which pursue you, speeding up over time, and the bigger ones, that move across the screen and destroy everything in their path.
This is mostly just a test for the cloud storage of scores, with there being 3 people who get their score specifically stored (2 of whom are me), and one universal high score that anyone can hold. Enjoy?