http://loda.jp/rock8/?id=193
The second set of Robot Masters, Sword, Search, Astro, and Aqua Man, are unavailable. First 4 stages are free to play. So far I've only played a bit of Tengu Man's stage, and it's much much more difficult than the 32-bit counterpart. The flying part feels more like a schmup just because of all the shit onscreen.
Also when you first start Tengu Man's stage, it plays the Japanese theme for it. When you die, it changes to the American version. Maybe this'll stick in the final game?