Hi G,
First off, love the Butano engine. I have been working in it for the last year on a portfolio project and the clear documentation and structure have made it a joy to work with. Second, a question - I'm trying to embed my GBA game on itch.io using gba.ninja. I am NOT an HTML coder, but I'm wondering if I am missing a piece - is the "embedded template" by hot_pengu and exelotl open source?