@Ashedryden It's part of my former colleagues @ Duolingo doing anything at all to get you to open the app and do your lesson. Changing the icon to a melting Duo last year for Halloween was pretty successful in driving press + social buzz. Also the art team there is just too brilliant to be contained https://www.standard.co.uk/news/tech/why-duolingo-melting-app-logo-b1114532.html