I've done some initial work over the weekend porting one of your games, G&W Factory, to RetroFab :) You can preview it here.
I'm not sure when I'll start working on the gameplay, but you can at least see what the device, packaging and instructions will look like. ACL is the only function that currently works on the device to turn on the sprites. And you can switch to the RetroFab (color) version of the screen artwork by pressing [TAB]. Feel free to let me know if you have any issues or suggestions.