Rotor

You control a battle tank (the Rotor) which hovers in a 2D-labyrinth. Gravity pulls heavily on the Rotor, making it fall towards the ground. As any contact with walls or enemies is deadly, your main task is to avoid that. You may rotate your tank freely and accelerate via an afterburner, thus manoeuvring through the corridors — imagine a mix of Asteroids and Lunar Lander to get an idea of the physics.