Yeah, I know it wasnt ninja gaiden, the characters where tiny and one color (maybe 2 or 3 with a background clear color). Alos, unlike Gaiden, the screen could scroll in 4 directions. It was a simple but very fun game to play... (IE Very MAMEcab friendly)
Added: Efjayel, no. The GFX in this game were much simpler. When I say 8x8 pixels, I am not kidding. Like was said before like the size of jumpman.