Zip Ball, a mono Sachen game that's ten worlds (50 levels) long. The ending credits seem to be glitched (at least on my color cart, though the credits appear invisible in some of the other colorized Sachen games like 2nd Force.) It's not a bad game, but the later levels get really cruel by having you not only reverse your controls, but having to do quick manuevers right after they get switched, which is disorienting as hell. O.o