Based on this code you can pack up a SNES game and make it directly available in the OUYA launcher, just as a normal game.
When running it, the game file is extracted and Snes9x EX+ is started with it.
Run prepare-game.sh:
$ ./prepare-game.sh "Super Pac-Man" superpacman ~/public-domain/superpacman.smc Game title: Super Pac-Man Full package path: romlauncher.superpacman Game file: superpacman.smc All prepared. Put a 732x412 image into res/drawable-xhdpi/ouya_icon.png
Now adjust the launcher image ouya_icon.png and build/run it
with the Android Developer Tools Eclipse IDE, or via command line:
$ ant release
The generated .apk file will be located in the bin/ folder.