You can go all the way to the left. If you got stuck at the map of nokkin (the place you cannot jump over), you can jump and put your arrow to the left, and the poptropican of yours would simply slip through like a glitch. At the map of dryads, just use them wisely to give you a high jump. Then just go all the way to the left and lastly to the main street.
To get out of twisted thicket if you are not a member you have to purchase a costume at a fee of 75 credits. Poptropica released a new costume that anyone can use. Read more from poptropicacheatz.com/.