Gravitron is a 2D vector game, very much like old games, Thrust, Gravitar and Oids. The game premise is to destroy all reactors for each sector. Collect fuel and rescue space-men, there is some interesting maps (30 total) to explore.
This game is best played with mouse-control, but other controls are available. Be sure to configure them to suit you.
Gravitron also comes with its editor – GravED. Feel free to submit maps to the author, if there is enough then new content packs might just be released.