Several spelling errors: "including," "beginning," "USSR," "its," "etc.," "satellite," and (most annoyingly because it's in the answer) "missile." Inconsistent capitalization in clues. Also, it is the practice in Jetpunk quizzes to allow last-name-only answers. And I found the Khrushchev and "ending point" questions vague. Nice quiz idea, though!
Annoying to have tried Cuban missile crisis many times thinking I was spelling it wrong each time, only to find that the answer is spelled wrong. Also, if you are going to require first and last names then 'Josef' should be accepted for Stalin because that is technically how it was spelt by him; it's the Russian equivalent.
Terrible quiz. Loads of spelling mistakes, including some in the answers that prevent you from getting it right (it's missile, not missle), really poorly worded prompts, some of which are simply wrong.