I wonder what the grade was.
Honestly, I'm rating this AS a class project. It's horrible. This says nothing about cell vs bacteria. Honestly, if you'de done something more "cellular", and less "campy manga"... you might be getting a better rating (I gave you a 6 on graphics simply because you took the time to give you're stick figures an actual shape). However, from my point of view, this is cheesy and will only impress your treacher because you took the time to animate something with flash.
... I should know... I did a similar project on a similar subject when I was in the 7th grade XD