Not a Deck user, but I’m on EndevaourOS. All the games ran perfectly, expect some minor issues with the Giggleland demo which tried to do some 4th wall things, like grabbing your wallpaper and that one was just a black screen.

My favorite demos are these:

• Roman Sands RE:Build is about being stuck in a mysterious world (feels like a purgatory to me) where you wish to escape. The OST is really catchy, and it has some strong Danganronpa inspiration, since the music feels a bit reminiscent about the series and it has the signature gambling gift system in it
• UNBEATABLE must be a fan favorite for Lemmy, or atleast with the 196 users, since you beat up cops on a rhythm basically. It’s a world where music is illegal, and the characters constantly refer to cops as fascists. Obviously the songs are PEAK.