By gobbling upp different energies from the planets you refill your epic weapons!
You only refill your epic weapons! when running over colors. BLACK GIVES YOU NOTHING!
White refills your health.

When you jump towards another planet. You must first defeat their planetary defences before you can start to gobble their world. You fight them with your epic weapons! thus depleating your weapon energies. The more depleated your weapon is the less projectiles it fires. If those pesky defences depleat your health, you die!.

Gameplay Video: