Aside from maybe adding another image folder for both sticks for when they're being pressed, nothing else is coming to mind; it's a pretty solid application so thanks for creating it in the first place!
But if anything ever comes up again and you're still up for suggestions by then, i'll let you know!
Though I feel like I've already made you work hard enough with my last couple of inquiries, so I'm leaving the rest to you lol
Also PLEASE do take all the time you need!