It's okay
The story is a bit contrived. And by "a bit," I mean it is consistent with every generic Anime I've ever seen, but this time, it is full of anthropomorphic rodents. Also, there were a few spelling mistakes that got to me, but that has absolutely no sway when considering the quality of this flash.
The sound got to me, but I think that's more of a limitation of Flash more than anything else, except I've heard the sound effects before.
One thing that bugged me, though, is why do they have a lunch break for school? It states that Ken is twenty, and I'm used to 20 being a college age so lunch is however you feel like it to be.
Overall, it's good for a flash movie, I'm sorry if I sounded a bit harsh.