This is perfect for middle school kids to understand functions. How do you zoom on the big map though?

Thank you!! I recommend taking a look at the later levels, it goes beyond a middle-school level of complexity! I have seen everyone from graduate students to tenured math professors to Grant Sanderson get stumped by late-game SineRider. It doesn't really fit neatly into any specific age group or "grade level"

The map should zoom with scroll, is that not working?