Thanks for the kind words! Yes it's really meant as an educational tool that helps refreshing or teaching some context!

When you try to run power flow, make sure to either mark a generator as a slack or add an external grid element.

We published a basic tutorial here: https://kickstage.com/blog/modeling-and-simulating-power-gri...

Or you check out this super simple example: https://bamboo.kickstage.com/?s=ccnlYeEB