PLEASE
Take out the beginning little credits sequence. You've got a great piece of work here, and the opening sequence totally slows your pacing and detracts from the rest of it.
Another small pointer is that people, once they hear sound in a flash, expect sound alllll the way through the flash. I know, it's a selfish thing, but Hollywood has gotten people used to it, heh.
Fill the dead sound areas with some sort of music and move the credits to the end, and it will garner a _much_ higher score.