I really have to agree with everybody, a great game. I just love the 'pure' atmosphere and simplicity. Although at this point (four games or so) pretty straightforward to finalize. All niceness aside, plant max number of trees from the beginning to outer planets, use inner planets just as seedling storage (no point in planting trees there as there are always over 32 seedlings) and milk outer planets to inner planets as much as you can. After a few moments you have a nice army on inner planets and voila, game is pretty straightforward from that point. If there will be any enemy efforts, it's easy to make a rehabilitating action as a massive storage of seedlings is always max three planets away. Works a bit like usa thinks it's foreign policy should, I guess.
My point is that when you find an efficient method, game turns out to be a bit repetitive (milk, milk, milk, milk, kill, plant all trees, milk, milk, milk, kill, plant all trees..). If you add any automation, for example seedling trickling to another planet and automatic tree planting, there is not really much to be done (after initial struggle on establishing a seedling farm) other than select your remote victim and shoot.