Box Puzzle
Start with Patrick. Move the wood box along the white arrow to build a bridge to the top-right corner, then use the two metal boxes to build a bridge to the top-left corner.
Switch to SpongeBob. Move the beachballs along the indicated paths (1 to 4). Now push the second wood box from the central island along the red path, and finally build a bridge from the bottom-right to the bottom-left corner. Collect all Bonus Bubbles and Krabby Patties.