So lots of people have asked about a downloadable desktop version of your games, so I have started on this feature. If you have a pro account, there is a new button labeled "Build for Desktop" next to each in your games list. Clicking this button will build downloadable, installable version of your game.
Now, when someone plays your game there will be an "install" button underneath it. Clicking this button will install a version of your game to play locally.
This feature is not yet complete!
Specifically, you still need an internet connection to play it
I will be adding an offline cache next, so that they will no longer need a connection, but I wanted to get it released for feedback ASAP.