-Finish showProblem() in components/problemSummary.js (send event with infos, and pass message to game component)
-Add new mode in game component: "problem", in which we show description + hidden solution (reveal on click)
+setStorage, updateStorage in case of computer game: fix that
+Implement chat (new mode ?! why not... still listen to oppid (dis)connect)
+Beautify styles
+Translations ? (probably not)