A car engine simulator, it seemed pretty fun to make one and, it was fun for sure. It's not a game ( yet ), but I'm going to try and make one of it. The Gas option increases / decreases the amount of gas ( pressure ) is given to the engine, the Throttle slider reduces that, and the Throttle Output shows how much power is given to the engine
VOLUME WARNING If you increase the speed of the engine, the sound will get louder, and it can get pretty loud. I made RPM as accurate as possible and it works, the sound may not be perfectly in sync with the engine, but you don't notice it once the engine is going faster.