To show the arrows, make sure that Show Back/Next Arrows is selected.
You can add animation to the Liquid format using CSS animations. The page that is shown has a class of activePage. You can use the class name to trigger a CSS animation.
For example, the CSS for a custom fade in might look something like this:
transition: all 1s;
-moz-transition: all 1s;
-webkit-transition: all 1s;
-o-transition: all 1s;