For sure! Happy to help.
I've optimised WJ2 — including icons that match gamepad buttons and other enhancements — so I can add it to the catalogue once I've applied a few finishing touches.
For Otto's Tennis, I think the easiest solution for menus/buttons is to label them with a 'hotkey', so like: 1 Player (L1); 2 Player (L2); Difficulty (SELECT); and so forth.
Cool. If you do any modifications to the game and its assets, do credit yourself for the mods you've made.
Yes, the hotkey solution for tennis game would be the easiest. I want to give it some more thought still, as I am too into these consoles, and I see this as a fun design challenge :--) Making a game that actually feels like it's designed for the Anbernic, is what I'm after.