I have been working on this almost all morning long. I started at about 1 a.m. and it's after 9 a.m. now. But I finally made a Super Game Boy border for GoSub GB. I had to think a litlte when I was designing it. I thought about what I wanted it to look like. I took the sprites from the game, enlarged them, colored them good and this is what I ended up with (eventually)

What do you think? I found and fixed a bug pertaining to the space character. I tested it on a real Super Game Boy and it works. I had to move the title screen and goal reached songs to bank 3. Now I only have 31% of bank 3 free, which is where I'm storing all the levels after level 25.