No. I didn't make clear mechanics that you can control.
You can switch track on "orange arrows", boost works every 3 second. Try to concentrate on one car.
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Ah, finally noticed the control hints at the start of the game. But it seems that clicking the buttons with the mouse works better than pressing the keyboard :)
Two players at the same computer is great genre. If you add more obvious controls and booster readability, I’d try playing for two! Otherwise great job, I see a lot of detail implemented.