So you're familiar with cannon games, like the Worms series, right? You control a gun, you raise or lower its elevation, you let fly with a blast, you miss horribly and you adjust your gun for the next shot. Simple, but fun.
Spacetanks is a cannon game, but with a difference; each level has some arrangement of planets on the screen, your tank is on one planet, and the enemies are elsewhere. Each planet has gravity, and your shots are affected by it -- if you're unlucky, it's even possible for you to wind up shooting yourself, as your shot gets slingshoted around the solar system to wind up kicking yourself in the ass.
You earn money for winning levels, and can upgrade your equipment; there's also lots of different type of ammunition. Typical in that regard, but the addition of orbital mechanics to what's otherwise a somewhat stereotyped genre makes all the difference. Goofy, but entertaining.
