Congratulations on your victory, and thank you for your thoughts! The intent with the ending is mostly to be left to the player’s imagination, with the result known and the method, well, defying the GBAFE engine’s ability to bring to life. But I’d probably have written it slightly differently, if I did it over again.
There will be a sequel, set 23 years in the future. Development diary is here with updates on the 21st of every month.
As for Estrelle’s theme, here you go. Tracks are kept on the website, with the only fully original track across DoW/Do5/HC being Rena’s theme in Do5 (made by AReliableChair).