The Back Button (Ouya)

[greatchicken]

My Ouya has arrived. For all the review flak its been getting, it handles PPSSPP quite well.

Except that unlike my S2, I don't have a back button - which opens the options menu.

Nor do I see any way to map a back button, although I successfully mapped the Ouya controller otherwise.

Has anyone tried to use PPSSPP on the Ouya, and has a stopgap solution? Pressing the Ouya Home button on the controller twice outright exits PPSSPP, which I don't want...

(PS: No Ouya snark please, I heard it all already. Thanks.)