Haha. You two are the first to ask for this actually. I was trying to encourage a little hacking around without posting the solution outright, but no big deal. I’ll make it public here:
[SOLUTION] To unlock the levels, please open the file manager and navigate to /home/pi/piper/userData. In the unlockedLevels.txt file, please change the number to 9. In addition, please navigate into the playData folder here and change the value in the highestLevelPlayed.txt file to 9. If you have any permissions errors, you can click on the update button (which will fix the permissions when finished) or you can open a terminal and type “sudo chown pi:pi -R piper/” followed by enter/return and then re-try the above edits.