Is it a reference? It doesn't look like something anyone would consistently be reaching for. It looks more like a fun visualization of some core concepts, something you would show people as a cool thing you made.

Even if it was a reference, the same criticism about left-right scrolling would still apply, at least if you're using the combination of resolution and DPI that people like me do. In fact, if it's meant to be a reference, then it's even more important to make it ergonomic.