"Stellar Sphere" is a scifi sport and action game, mainly set in space and in zero gravity. The rules of this game are tremendously simple: you must move with your ship through an area, look for a sphere, capture it, and throw it over the wormhole that is active. That's all. Almost.
In Stellar Sphere there are standard weapons and energy weapons. The last ones drain a lot of energy, but they will solve the majority of your problems. Find more energy in barrels floating in space, and scoring points. You'll need that extra energy.