I just side loaded Roblox for my MiBox. I had to use a Bluetooth keyboard, mouse and joystick to play this game. Actually, you only need the keyboard to sign-in the first time you play. You don't need it going forward.
That said, you definitely need a joystick AND a mouse to play. Some of the menu navigation must be done with a mouse.
Instead of having my kid use 3 BT devices to play this game, anyone know of a slightly more elegant solution for this blue tooth device hell? Is there a joystick with keyboard and touch surface built in or something?
Never played Roblox but Minecraft will work out of the box with a controller.