Use WASD to move the left hand, and the Arrow Keys to move the right hand. Your goal is to get the hands to meet up and shake! If you get stuck, press E to undo or R to restart. 

There may be some doors blocking your path. Open them by pressing or pushing boxes onto the green switches. Make sure you don't close the door on your hand... they're quite sharp. 

HINT: The hands need to be facing each other to shake successfully.