For Amazing Alex The Backyard level 2-13, called “Multi Punch”, angle the shelf downward to grab the first two stars with the 8-ball. Place your boxing glove just right of the existing one, and place the scissors just above your glove. As the 8-ball falls, it should trigger one or both of the gloves, eventually cutting the rope and dropping the pail to the ground.
If you have a different strategy for completing this level feel free to leave a comment below.