In order to pass the level you must collect all the diamonds in the level.
Every level is an interesting combination of speed and action.
In passing levels you are helped by different colored balls which all have their special abilities. You get the balls in your use by travelling through different colored gates found from the levels. The red ball gives you 2x speed which saves you time and helps you complete long jumps. It may be difficult to control it because of the high acceleration, but usually getting this is nothing more than a pleasure. The green ball on it's behalf gives you the ability to float nearly weightless and it can also help you break much faster to avoid dropping to gorges.