Hmmm...
Well, that's not a bad flash, and it will probably pass through the portal, but one thing that you could do to help this along would be to:
change the screen size to make it a bit thinner to fit the flash
Make the feet more animated
I shouldn't really be able to see outside of the area with the background on it, and feet move when walking. Improve on these, and you've got a decent flash.