Sharp your scissors, you are going to need them. Various trees need to have some shape and you are allowed to have a short look at the original only. Extreme Gardening as you may not know.
Extreme Gardening is some kind of experimental almost minimalistic game. You always get an original view but then you have to cut a full grown tree or trees into the needed shape and get into percentage. The game is really worth of your time, maybe you will like it so much this work will become you life job.