Hi, I am new to this and have just setup up my new rpi2 and I am having the same problems. Also the menus in most games the graphics are all corrupted, someone else posted the same problem with screen caps but i cannot find the post.
I have tried changing to different screen options but no good.
Im in Australia so not sure if its a PAL/NTSC thing or whats going on, I can actually play mario cart and super smash bros almost ok, snowboard game same thing on the menus, resident evil crashes out but you can just about make out the language selection page.
Thanks for this great little project.