This one is simple: after completing a level you can play again except there is one new factor, timing. The faster you complete the level the higher your ending total point multiplier will be. There will be a multiplier at the top of the screen counting down, when going for this make sure you complete the level when the time is at 2.0x or higher. If it drops below that before you finish the level, you should just restart. Easily done on the early levels, do NOT worry about the points, just complete the level.