I play Master Of Orion 2 on Q1U. The game is perfectly made for Q1U even though the game existed maybe 10 years before Q1U came into existence.
The touch screen and sleep functions of Q1U doesn't work with the game, but the playability is not hindered.
The 5 hour battery life on the extended battery isn't sufficient for me to conquer the galaxy at the highest difficulty level. But I am not complaining.
The game is played on trains and in waiting rooms. Occasionally a female would look over my shouder at the game and smile. Perhaps she was amused by an old child, or maybe she was impressed by my negotiating skills with alien races, or by the sight of my armada of doom stars.
My other favorites: Civilisation 2, UFO X-Com 2, Magic The Gathering should all work very nicely on the platform. But I haven't got round to install them.