You did a good job. I like your humour and use of a non-dice mechanic.

I am a bit confused about the last part. Is the player with the support of 4 rulers now an ambassador or a ruler? Why do they have to write down a list of words, and who is picking them? If everyone is in the rocket in the end, why does the ruler have to choose an ambassador?

I laughed at the ending. Haha, why? Because.

I feel the words that were selected could be used in the design of the spaceship. Maybe synonyms. Nice straightforward and simple mechanics, though. Great job!