Dedicated work pays off.
Working two years on a single project shows a lot of drive, and you deserve a ten just for that. However, you captured the essence of the Mega Man franchise in your art, and that makes it even better. You use a lot of clever camera angles and effects, which makes it even better.
However, the voice acting seems to fluctuate between mono and stereo, and the voices themselves are a bit lacking. I'd suggest using GoldWave or another editor to beef em up a little.
My only other complaint is that you might get a better product if you used more frame-by-frame where you used shape tweening.
Keep up the great work - I'm impressed.