During the event I saw some other cursors do some reactions/emojis, but couldn't figure out how they were doing it. Only just now did I realize the keybinds window in the settings was scrollable, where I found that the emojis were just the number keys.

I think for next year, it'd be helpful to have a How-to new user guide near the Share, Settings, Chat, and dark/light mode buttons. Something that pops up a window that basically gives a quick rundown of the essential things a new user should know to have a good experience, like letting them know that long-pressing lets you know who placed a pixel (only discovered that toward the end), how to do reactions, etc. Nothing too overwhelming or info-dense, just the essentials.