I had added this to HBmame when it was first announced, back then there was only a .neo file and a CD. I had to split up the .neo file manually to make a proper rom set.
But now the release contains roms, so I'll use those and throw out the ones I made.
I'm completely hopeless at this game, not able to even finish the first level, so if there's graphics problems later I'll never know about them.