Interesting, but the intro is too confusing. Why do I have to scroll down to scroll sideways? I tried clicking the arrow, dragging the page, pressing the right

Interesting, but the intro is too confusing. Why do I have to scroll down to scroll sideways? I tried clicking the arrow, dragging the page, pressing the right arrow key, nothing worked. Eventually I clicked "skip intro" and it wasn't until the 2nd time I loaded the page I thought to scroll "down".