First of all, congratulations on such a fun game, I had a blast. I know I might be coming late to the party, but there's this series of videos of this guya who made a 3d level viewer, from which it would be so easy to get stills for the textures, which can be seen here:
Maybe you could add more stages with the rest of the 3d levels of the game? That would make for some awesome JP action!