make text wrap when larger than parent

https://codepen.io/Antony-Collin/pen/WNYejKZ So when the text beneath .game spans is larger than it's parent I want it to continue underneath instead of the parent expanding its width. There's no width set for the container so I guess I need to put one so that it doesn't expand but I don't really want to hardcode, is there a way to avoid putting a fixed width ?