Improve Diagrams

I noticed that at the top of the AP Calculus Course on PC, there's now a game-like overview of the different units. I had a few suggestions that I was hoping y'all would take into consideration:

1. Please add an option to hide and unhide the overview that remembers what you had it set to (hidden or unhidden) whenever you open the course. There are a lot of shapes and things to process every time I open the course, and I would appreciate making it a bit more seamless.

2. Consider adding the names of the units and perhaps have unique symbols/letters (like d/dx for derivatives, an empty integral, or something akin to that) next to the units for users to get an idea of what topics they're looking at rather than just rows upon rows of crowns and the empty titles "unit 1", "unit 2", etc.

3. Maybe add some color in there? It's kind of *just purple*. The Interface definitely could be more aesthetically pleasing.
These are just suggestions. Thanks for reading!