Looks like they’ve finally hacked this system to add games and made a YouTube video with instructions. It also has a link to an Instructables article as well. Not as easy as Hakchi for NES/SNES mini, but at least it makes the console more appealing...
FWIW it sounds like there might be an updated model next year that improves some of the functionality of the system. Hopefully it will still be hackable if they do.