1. A brief cutscene shows Lester entering the strange craft.
2. Notice your hand in the upper-left inset. You want to press the first several buttons to get more buttons to appear, then press the four buttons upper-left to turn them red and green. Lastly, press the large white button that appears in the center.
3. This short level ends with a brief animation showing the bubbles holding Lester and Buddy launching away.