Animation took 3-4 hours?
You can tell.
The voice actor didn't seem the slightest bit interested in what he was doing, so it came off completely sarcastic. If it was intentional, you took it too far. It made the flash seem sub par at best.
The ending sucked worse than the entire flash up to that point.
Work on plot. Work on animation. And next time, don't submit to the portal without serious effort.