It’s at this point that you may need to use the undo, reset, and extra screw options, which are available on every level. However, you can only win extra screws from chests and at the winner wheel. Clicking the screw icon adds an extra screw to free up more space. The undo button has a finite number of uses, but these are restored on each level. If you have no choice, you can use the reset button to start the level over from scratch.