There is an older Windows Store version that works on Windows 8. And there is also an IPhone/IPad and Android versions - all free. I don’t like the interface on the old one as much but many people do so maybe you’ll like it.
It’s large because it’s 3 text adventure in one (that version at least) and it’s programmed in .Net and all the runtimes are bundled to make sure it works on all machines.