You're halfway there. Congratulations!
Now you'll get to see how well your puzzle-writing skills shape up against your classmates'.
Remember that you need to solve 15 of the puzzles in this year,
and at least one other team must solve your submission. If you
like, you can waive the latter requirement by releasing your
puzzle's answer to the other teams.
From errata page: Clarification:
You cannot get credit for passing your own course. (Duh.)
Once you complete the requirements, we'll give you a final exam for the year. We'll also ask you to rank the other puzzles based on how much you liked them.