Picking Up Patrick
Whenever both SpongeBob and Patrick are present, you can switch between the two by pressing the "Enter" key.
Press "Enter" to switch to Patrick. Step onto the green button "A", then onto the purple button "B". Press "Enter" again to switch back to SpongeBob, and place SpongeBob onto the yellow button "C". Switch back to Patrick, step on the purple button "D", move SpongeBob passed the purple seaweed, switch to Patrick and step on the yellow button "E", and finally switch back to SpongeBob to join Patrick in the same room.
Place SpongeBob on the light blue button, and move Patrick into the top of the two rooms containing the Krabby Patties. Move the box along the black path to open the red seaweed gate, and collect the Krabby Patties. Return to the room, and repeat the procedure with the purple button and the bottom of the two rooms.