This was fun. I got 9/20. Some of them I should have gotten right, others were me being dumb.
Surprisingly, I did well on one of the colors questions. I did terribly on question 5 (the answer is wrong!) but I got a perfect score on question 8.
My advice: don't let the clock pressure you. You have more time than you think, so read the question carefully. They are written to trick you.