This is great! I did quite a bit of work in system dynamics during my masters in social work -- one thing that has been missing from the world of computer simulation has been good open source tools and also tools that can start taking causal loop diagrams and turning them into simulations that can be played with. Excited to check this out, bravo to the dev.

I think that "systems literacy" is the literacy of the 21st century, and understanding feedback loops is a key part of that literacy (rather than just thinking in terms of linear cause and effect)