Yeah, I tried playing Megaman 2 to start, and while it worked originally, while I was editing some sprites (since chunks of the building in the opening are stuck in the background) it suddenly wouldn't start the game back up when I closed the edit menu, it just sat there with the sprite highlighted. I just decided to save the 3DN then close the emulator and open it up again, but now it won't open Megaman again, it just stays on the grey screen.