It was requested that it would be good to add a way to chat between players. I think this would be great, especially for encouraging more use of the online play mode in the future.

Idea 1: Simple chat window
A simple little chat window where players can communicate is the obvious solution.

Idea 2: Reactions
Another idea is to add a list of reactions that the player can choose from. e.g. 😲, 😎, 😄

There could be a dropdown menu near their name where the user can choose an emoji to send. The emoji could then appear near their name, to show their expression to what was happening in the game.

I think this would be a really friendly UI for this.