A game that takes place in 3 dimensions around the player.
An Android phone is needed to play, the player plays through this and interacts with within a virtual spheres, which envelope them. The world around you is visible only through the window of your cellphone (the direction you are facing are determined through the phone's accelerometer and compass).
Construct a machine, composed of various modules, to destroy you opponent, who is also building a machine. Rocket, shield, spiked, heavy, ranged modules at your disposeal. Everyone can see everything, you need to out-wit your opponent in a multiple stage interleved build.