heya! unfortunately this game is browser only & is free. i have some plans of porting it to another engine in the future to make it downloadable but no concrete plans yet.
yup! the game is made using twine so i think it would be possible to turn into an electron app or something like that. but honestly i'm moving away from twine and planning on making my games on a proper game engine (godot, most likely) so porting the hanging heart is a good opportunity to learn godot & to make it downloadable.