http://scirra.com/demos.php
I especially like the realtime zoom, scroll the mousewheel for it <img src="{SMILIES_PATH}/icon_smile.gif" alt=":)" title="Smile">
Oh and graphics/sound by Gamesare, www.gamesare.com
This demo makes the most advanced use of the display engine so if you could try it out and let me know if the zoom messes anything up, I haven't tested this on any graphics cards other than my own. Cheers <img src="{SMILIES_PATH}/icon_smile.gif" alt=":)" title="Smile">