I think people have managed to get it to run on Android (no official English version was ever released on Mobile but there are good fan translations, all we had until this year on any platform.)

There is also a website that works on mobile and has a playable version of the fan translation hosted and is mostly complete but missing some details.

Fun fact about the VN: When Nasu wrote FSN, they originally did not want to include any H-Scenes, but Takeuchi, the artist, thought it wouldn’t sell otherwise. This lead to the 2004 release having some legendarily bad (and often memed) H-Scenes in them as Nasu is not really known for writing ero-stuff. Whether or not you want to read those or read any of the remade versions where they replaced the spicy stuff with more tame stuff is up to you.