Starts off simple, becomes pretty later. Destroy enemy lines by catching the ends in the explosions. Similar to Missile Command if you were alive in the 1980's, which I doubt most of you were but you can take credit for anyway. Play and enjoy :).
The game calibrates lag (hence the base 50-60 fps), so it may seem like its lagging but it should still be playing normally.
Mouse to move and shoot, 1-3 keys to select turret