Hagane, which I wanted to try out pretty badly.
So I emulated it instead a bit. I get owned pretty hardcore by the long run, and later on by the factory (lava). Such an awesome game though.
Games that have worked so far:
Caravan Shooting Collection
haven't tried out a ton of other games yet though...
To explain what I'm doing, I've taken a Game Genie out of its shell and I use it as a pass-through. Carefully fit a SFC game on top of it, and the Game Genie PCB sits tight in the SNES Model 2.
But I'm thinking it's time to get a real Super Famicom - partly so I can use S-video.