Thanks for your port, Reesy. Out of the 3 SMS emulators I tried on native OS, I found this one to be the best.
There's only one thing missing IMO to make it "perfect": button configuration. Unless I missed something. Isn't there a way to configure the buttons? Some games such as Alex Kidd have inverted buttons, and it's hard for me to play that way. Plus, I like to set the save state / load state functions on L / R.