Use mouse to strafe, right arrow to go to the menu, space to start, green flag to reset. Once you get the high score number 21 and press the down arrow button you'll switch skins. Once you get to 30 high score and press the left arrow button you'll switch skins again.
I used youtube to help me start. Thank you Scratch Team on youtube. I'll make more skins for the paddle. Every time you go from the menu to the game the high score resets.