Arguably one of the most defining characteristics of Phoenix is just how easy it makes implementing soft real time features. Think chatrooms, games, and other multi-user/client interactions.
A fun and easy way to get started is picking a simple tabletop game you like and know well – something like uno or scrabble – and re-creating it as a Phoenix LiveView app that maybe also leverages Phoenix Channels for game state as well as Phoenix Presence for non-playing users/observers.