I had an idea about a game where the player is a space ship in space and has to use "hearing" and sonar in order to guess what is where. The setting is 350 trillion years into the future and the laws of physics have degraded and changed. All the stars are gone and there are only a few human space ships left in the great far blackness, looking for FAST's(Fixed Points in Space and Time. They are small holes in space that appear spontaneously and generate power) to power their ships. Since there is no light, the player has to listen for fasts and large collections of rock and stuff. The Fasts would also disintegrate so the player has to find them quite fast(hence the name). There would also be a time monitor. The time monitor would show you when and how fast Timeripples are coming your way(time ripples are remnants of explosions in time) and Realization waves are coming. The universe forgot a lot of things, and when it remembers, the Realization waves call the objects back into existence(So, many things like other ships sometimes but usually rocks and junk will be called back into existence) so the player has to watch out for that too.
The player would have to use his mouse to pint in a direction and listen. This would give him a pitch and volume that would indicate what can be found where. Regular rocks would just raise the volume a bit and perhaps manipulate the pitch by a very small fraction. However Fasts and black holes(invisible. You just have to listen to them and see if any rocks fall in) would drastically manipulate the pitch and maybe even rhythm.
I was sort of inspired by Osmos. I was already making this but I realized that Game Maker cant manipulate the pitch of sounds so no dice...