Looks and feels really great! Nice one 👍 👍

• browser window moves a bit onScroll under osx (maybe needs prevDefault?)
• "go back a bit further" controls are the edge are nice, no "go forward" a bit equiv?
• clicking on a visible label on the timeline feels a tiny bit disorienting: where did it go? what state am in now. Feels like a place where a little animation might actually help.
• I like being able to toggle by clicking time travel a lot!
• small glitch? timetravel > live > (while its still going into "live") quickly click pause.
  • stuck in limbo. can recover okay though.

@foot

• browser window moves a bit onScroll under osx (maybe needs prevDefault?)

Could you try fixing that on your laptop? I can't really test it without getting live feedback.

• "go back a bit further" controls are the edge are nice, no "go forward" a bit equiv?

The idea of these markers on the left side was to signal the overall context in the timeline and the fact that they are clickable is just a nice bonus. I was thinking of also adding them to the right side, but then I thought it would make it more cluttered and the context wouldn't be that obvious from a glance. I'm still not sure about it, but for the start I'd just leave it as it is.

• clicking on a visible label on the timeline feels a tiny bit disorienting: where did it go? what state am in now. Feels like a place where a little animation might actually help.

I added the animation and it looks much better now!

• I like being able to toggle by clicking time travel a lot!

Me too :)

• small glitch? timetravel > live > (while its still going into "live") quickly click pause.
  stuck in limbo. can recover okay though.

I fixed it, i.e. made it consistent with what happens when you click on LIVE -> TIME TRAVEL. Not sure that fixes all the glitches, but it does seem to behave better.