meh...
it wasn't that bad, don't mind the other guy, i loved the music personally (and sprite movies) it's just that, yeah, there was no background, and there is a sprite for warp pipes that you can use. Also, mario and luigi stayed in one pose the whole time, even though they smacked into each other impossible angles... there are sprites of them running and punching and lying down, you just have to spend effort find/using (or making!) them. good luck in the future