this includes a maze making program

https://patchstorage.com/video-game-maze-and-moving-target-pd-gem/

This is how I set up a linux debian for pd and how to install GEM from terminal and PMPD-tar , how to get programs from debian package installer / gimp etc lots `of pictures
https://patchstorage.com/how-to-install-linux-mx-for-pd-gem-pmpd-my-setup/