Add mobile controls to any Scratch project

How it works

• PatchScratch adds a sprite called PatchScratch Controls with an on-screen joystick and buttons.
• Every key [x] pressed? block for a key you map also checks the on-screen control, and every when [x] key pressed script gets a copy that runs when the on-screen button is tapped. Your original code still works with a keyboard.
• Scratch only tracks one finger at a time, so the player can't hold the joystick and a button at the same moment.
• Scratch can't tell whether the player is on a phone, so the controls always show. Turn on the show/hide button so keyboard players can hide them.
• Projects that check keys using a variable inside the key block (instead of picking from the dropdown) won't be rewired.