i might do custom controls here in a future patch cause I'm not gonna lie the UI is uglier than I remembered (the faults of making a overhaul in 6 hours while tired LMAO) but if you run your games in windowed fullscreen it can do that, if it's in just normal full-screen there's not a lot the app can really do unfortunately
but games for the most part do support it, i tested it in a few games and if again you just use windowed fullscreen, it works with no real issues, I don't believe there's much I can do though for if you just use fullscreen because of how Windows works but i'll look into it for the next patch