I'm glad to hear that it's open source now. I specifically took issue with advertising that it would be open source before the Kickstarter, but then open-sourcing it became a Kickstarter "stretch goal" implying it would have remained closed if that funding goal wasn't reached. I was on board until that surprise.

Looking at the Kickstarter right now:

"Stretch Goal 3: Modding Support

This goal includes three things in specific:

The game source code will be publicly available! ... The code will be released under a license that prohibits using it for any commercial activities, and requires you to share-alike any modifications you make. The release will also not include any assets, so you'll still need a copy of the official game to play it."