To maintain the browser usability when viewing C2 games, C2 only blocks keys which are used. Behaviors with default controls that are the arrow keys block the controls. Otherwise, drop in the Keyboard object and add an 'On key pressed' event for that key (not 'Is pressing', the trigger version). This will block the key and make C2 handle it, which should prevent scrolling. You might want to do the same for spacebar which is page-down in some browsers.