The forest is the first level of TumbleSeed. It may not be the hardest, but mastery of the forest is essential for farming resources to use in the later levels.
Features and Enemies
Grubs and cycling flies are extremely common here. Compared to the other levels, there are a lot less holes and spikes as well. Aside from that, the forest doesn't have any other unique features [aside from secret stuff, which we should discuss eventually].