Reviewing Unit Assessments as AP Test Prep

We are working though Unit 5 and Create now. Once wrapped up, I have been considering opening assessments for students to go back through Units 1-5 to review where they made mistakes so they are studying the things that were most pertinent to their learning. Does anyone have a better way to do this or fun ideas for this? This is my first year through APCSP and I am still trying to learn the coding aspect so I am not a huge asset to them when there are coding questions.