Use 1 and 2 to shrink and enlarge the ball. Use "WSAD" to move the second additional marble. Use the arrow keys to move the first ball.If you see black boxes, enlarge the ball to touch all the boxes at the same time. If you see a "Fix" button, press it to restore your marble.
Marble run. I still need to add instructions in the beginning of the game. Thank you to SSS17 for some inspiration. Thank you to the creators of Scratch 1.4 for the marble script and thank you to hdez for teaching me how to use Scratch.