You are given 6 films and 6 criteria. The first answer has to fulfill all 6 given criteria. When you guess that right, the bottom criterion disappears and the next answer has to fulfill the remaining 5 criteria. The next has the remaining 4 criteria, etc. until you finish.
In order to create a playlist on Sporcle, you need to verify the email address you used during registration. Go to your Sporcle Settings to finish the process.