Go and Play level 25, "The Centre Cannot Hold". Surround the 2 huge planets in the. Next, start putting beacons from your surrounding planets on the huge one. Play "Forest" in Dark Matter mode. There will certainly be a 5 defense-tree enemy planet close by, and 3 planets you can occupy (2 of them with 5 Dyson trees and your beginning planet). Completely place the Dyson trees anywhere possible, then start sending out seedlings by means of beacon to the closest enemy planet.