This is the 1.9 Update, which adds:
• Message Chat
This feature lets you send free messages [with filter]
This is currently only in Default mode, and will be rolling out to all game modes over time.
This is the 1.8 Update, which adds:
The One For All mode! It starts with 1 tagger, but when someone is tagged, they become green and can’t tag anyone else. Game ends when tagger tags everyone!
A new game thumbnail
Cursors on the lobby