Did Neil Armstrong use creativity on his space rocket?

Answer 1

No, Neil Armstrong has never flown in the Space Shuttle, in fact he never went back into space after his moonwalk on Apollo 11.

Maybe NASA did not want to risk losing the first Man on the Moon to an accident, or that they had absorbed too much radiation to risk sending them back into space.

Answer 2

No. For one thing Armstrong did not design the "space rocket" on which he flew. All of the Mercury, Gemini, and Apollo astronauts were engineers as well as pilots. They all had input into the layout of the instrument panel. They also went to the design meetings of the various systems within the spacecraft and the launch vehicle. That was more to familiarize them with the vehicle in which they would ride. They raised questions and offered suggestions during these meetings, but the final decision was made by NASA headquarters, who were paying for the vehicle. The actual Apollo spacecraft was designed by the manufacturers, North American Avaition (CSM) and Grumman (LM). The rocket that launch Apollo was designed by Werner von Braun and his team at NASA's Huntsville, Alabama facility.