Hey shadree! Sorry about that. This is a quick game we developed for a hackathon in 50 hours, so a few issues are expected, like this. However, we'll check and fix that as soon as we finish updating our last game (give it a check, you may like it: http://exagames.itch.io/outtamaway).
Finally... it is indeed possible to get every piece of clothing without jumping on the trees, you just have to try a couple more times.
Thanks for your feedback!