Too short... and what?????
Crazy music, I give you that. I'm not sure that you'd call that an intro. You could have just made this with html. Put text that says what was at the beginning and a gif of some stupid character getting smacked in the face. THAT would be better than this. Hey, helpful tip: On the button making in Flash the "Hit" frame should be the area in which a user's mouse cursor can actually HIT the button. So your "enter" button is hard to click. Try making a simple filled rectangle around the TEXT on the "HIT" frame.
Don't upload things this short to Newgrounds. It's bound to get blammed. Sorry!