I have a few minor gripes:
1. Click (pause) and double click (full screen) interfere with each other. I don't really want pause to have more of a delay than it already has, but that's the only way to allow a non-pause double click.
2. I'd prefer if spacebar paused unconditionally. When focus is on other controls, it activates those instead, which I understand for a11y, but it's a bit annoying when other players do grab every space for pause.
3. I think < and > used to nudge by a single frame (when paused) but no longer do?