As soon as you jump out of a ramp, you must follow the colored dots with your mouse to perform a trick.
The more tricks you do for each ramp, the more points you'll earn.
The game is over when you don't perform the required amount of tricks for the level.
The faster you execute a trick, the more points you'll earn.
If you hit the floor while you're in the middle of a trick (red dot), you crash and lose all the points for the current ramp.
If it's an orange dot, you don't lose any points.
If you land with the green dot, you're alright, your points for the current ramp are multiplied by 2.