This game's development started nearly 10 years ago. Just think for a moment how much the world has changed since then. Yeah, Inform7 was probably a bad choice of a platform given how things have progressed these days. But how in the literal fuck would any developer know this back then?Alternatively...
Package the game with the files needed to run it... Like most folk do.
Aika chose a platform that worked for them at the time. It's a shitty platform for the project (which is a sentiment they even expressed at some point before if I'm not going crazy) but nearly a decade of work has gone into the project on that platform and so they're basically stuck with it.
Is it really that fucking hard to download one extra thing to run a game?