We recommend all users begin to play directly in the web browser and are working towards retiring all installs in the near future. To play in the browser, you will simply need to log in at https://account.tytoonline.com/login and then press "Play the Game!" from the homepage or sidebar.
Simply head over to the Google Play store to install the game as an Android application.
This will work on Chromebooks running Chromium 53 or later. For a full listing of Chromebooks that support Android applications, check this link: https://www.chromium.org/chromium-os/chrome-os-systems-supporting-android-apps