Has anyone else loaded a new cube and found the 2D view showing up in red instead of grayscale? That has happened to me a few times, and I think I have figured out how to reproduce it (in Chrome).
After seeing the score window, while the animation is running to move to a new cube, right-click anyplace in the 2D view. It doesn’t matter if it’s actually on a colored area or not. When the 2D image blanks and shows a new plane, the whole thing is in red.
Right-clicking again, anywhere, seems to reset the color most of the time.