Use space to use superpower while using arrow keys. It makes your motions MUCH faster and speeds you up. Also, up arrow is jump AND slowdown when falling. Reverse direction with R. Combined with superpowers, you can achieve massive speeds. You can also turn midair with left and right.
Space is OP Try to turn midair so you fall on one side of the board, and superjump. You can aim the jump, and if you have a good angle, you can accelerate extremely quickly and break the game.