Keep it alive! You need to keep the forest alive.

Trees get water from lakes, growing when they have water and dying when they don't If a group of trees get big enough you'll score points Some large trees will turn into mountains and you'll get $10 each time they do Trees near mountains will produce clouds Clouds will spread and rain down water, creating lakes if they rain down enough

Inspired by The Game of Life by John Horton Conway

EDIT: added hotkeys, slowed the game down by half, added starting tiles, reduced starting money