Set a meta viewport. This stops a whole category of paint storm related bugs
that reproduce only on mobile.
Use transforms on score addition to stop repaints

The score addition moves around with top. This causes the text to snap to lines
during the animation, which causes it to repaint every few frames. This causes
jank. Translates do not do this.

TODO(someone): I think I rather botched this conversion. I couldn't get
chrome to take the translate3d params without killing the non-prefixed ones.