This is an interactive tool that lets you edit a procedural level generator and then automatically sample it to understand what your changes did. Mike Cook made it as part of a series called Possibility Space.
You can find a full written tutorial with interactive Javascript examples here: http://www.possibilityspace.org/tutorial-sampling/
This Processing repository is licensed under the GPL 3.0.
Art provided by Kenney (kenney.nl)
An initial version. I built the Processing version before doing extra work on the interactive p5.js versions, so there might be some differences. Spot anything - let me know!