Use the Arrow Keys to drive. Space or down brakes your car. Tap on a corner to begin a power slide. Press 'C' to change your car (when not driving). Press '0' (zero) to organize the start of a multiplayer race. Press 'J' to join one that is starting soon! Press 'L' if things get too laggy, or glitchy. (it drops the frame rate to improve the game play). Let me know your general experience of the multiplayer please! If your PC is lagging, try pressing 'L' to toggle lag mode (where the screen refresh drops, but the game speed should improve).
The game is not on sale on iOS at the moment. Fact: GT Racing: Motor Academy got pulled from all of its compatible devices in 2017, and this is the 2012 version. My best time is now 1:11 (bet you can't get any better than that) Let me know in the comments if there are any bugs or your best lap time.