Would love to be able to zoom in/out and rotate, I kinda was expecting to be able to do it with the mouse and was a bit surprised that clicking just restarted the animation/simulation
Great work
The clicking to restart is there mainly for phone users, I realized after sharing with a friend that hotkeys aren't very mobile-friendly. I don't have a good way to detect desktop vs. mobile clients, and technically one can also have a keyboard connected to a phone.
I've also been thinking about zooming, I'll see what I can do over my next lunch break :D