In this full 3D race, you have 8 tracks and 28 tasks and goals to be accomplished. You have also 16 levels of improvements for the car; you can improve speed, manageability or nitro, but it's a triangle where you have to sacrifice some of the 3 to win in the others. For instance, in a rainy situation you should sacrifice speed and play with maximum manageability. At the end of each race you earn money, so you can buy improvements to have a better chance in the higher levels.
In the race, use the arrow keys (or the keys W-A-S-D) to move. The key X for Nitro (also the key N or the space bar). The nitro bar fills as you run and empties when you collide or use it (indeed). Between races, interact with the mouse and the space bar.