Most of these haven't had updates in 3+ years with the authors disappearing or simply not updating the game at all. Waiting for the original author to update a title may mean it never gets updated.
I understand it is probably too much for one person to properly fix every game out there, but...
I thought there was an experimental full OpenGL driver for the Rasperry Pi added earlier this year (you'll have to install it from the experimental section of Raspbian) but I wonder if OpenBOR can add in a OpenGL ES renderer.