Glad you can play the game on your phone!
The game is pretty lightweight, so I think your desktop should still be able to play the game. That said, since you mentioned it's pretty old, the probable cause is that you don't have the built in edge browser, which the windows build uses (I'm assuming you are on windows? You didn't specify the OS)
In case you still want to play on your desktop (and it's windows) I uploaded another version for windows called NWJS, you can try that instead. Let me know if that works.