I'd also double check any textures used. I've found that using too large textures often results in things not rendering in builds. You should be using 128x128 px textures when possible
I've been using Twilight menu on my 3DS for a while now, and so far everything works great and it just keeps getting better and better with every update! I recently got a r4i Gold though, and was hoping to get Twilight Menu installed on that, but when I boot the flashcard from the 3DS menu it...
I didn't know they made an MSU cart for the Genesis.... I knew about the SNES one and the library for that is rather large but the Genesis one has very few games