Thanks for the feedback!
While I have played Echo and it is one of my favorite VNs, Fueled by Insanity is actually based on a story I wrote 8 years ago, so story-wise, it should feel and turn out quite a bit different from Echo.
The music is not open source. It's all music that I've written, performed, and recorded specifically for Fueled by Insanity. I'm glad you like it!