Very cool game! The game doesn't tell you really how to play it very well with the controls alone. For anyone confused, you select X - Green, Y - White, Z - Blue, and drag your mouse to push the nutrients along, you can change the size of what your pushing with the scroll wheel. You want to match the nutrients your feeding to the marked color under the saplings. I noticed when the tree on the top right grew, it was hard to see the nutrients down the root for the top left tree. Very cool concept and could be the start of a very interesting game!