From what's shown on default, there are at least 6 levels of problems (called Quizbox), each of which has 15 questions. However, for somewhat reason I got stuck very early at 2-14, so the only solutions I could share are until 2-13. Let me know if you find the solution of 2-14, and I will probably continue the recording of further quizzes.
At this time, Zeo has 8 views for ChuChu Rocket! spread across 1 video. His channel published less than an hour of ChuChu Rocket! content, less than 0.01% of the total video content that Zeo has uploaded to YouTube.