Simple mobile buttons you can add to your own game for mobile support in scratch 3.0! In order to change what the buttons do/ to add them to your character, just delete Scratch cat and then use the "broadcast" scripts. For example, add "When I receive 'Left'", "change X by -10" to your character, and under any of the XYAB broadcast recievers add anything you want to happen!
Thinking about making a joystick version of this soon. In the meantime, have fun making mobile games!!