Beautiful, but challenging worlds await (pictures)

The early levels have a nice, bright blue-skied theme as you time your jumps to get all the Lums. Don't be fooled by the pretty scenery; you'll be restarting levels a lot to master them.

As you progress, you'll move into darker themed worlds with more obstacles and monsters that you'll need to avoid.

Look for these helpful blue creatures that are happy to give you hand so you can swing to the next platform.

Some sections of levels have air currents that will keep you aloft longer. Your timing is crucial, even with the help.

Some levels have ziplines you can quickly slide down, but you'll need to time your jumps if you want to grab all the Lums.

When you reach the end of a level, you'll watch as your collected Lums spiral toward the center. If you get them all, you get a red ruby to help you unlock the undead level. If you don't get it, you'll need to restart and do it all over again.