As I teach biology, I can totally related to the subject.

The animation is neat, understandable, clear and appealing.

For the biologic part, you talk about the microbiome in the guts, but show a picture of the stomach. Why?
If I'd watch this with my pupils (who don't master english that well), I'd probably let them do some research to know what was simplified, what kind of sources you used and so on. When my pupils watch movies or read documents, it's one of the main things they have to do and your animation fits to it, as you mention all the sources and show different interpretations of the topic.

Nevertheless It's a good job.
I'll be glad to see more of you!

You have some talent, but you should improve.

I understood everything.

Kinetic typography, has been overused these last time, so it's pretty difficult to impress people with it. I would base more on unexpected things, and the song makes it pretty slow, so I would have choosen a different one. But it's ok for a beginning.

Like the book

I did read the book and I find the game pretty amusing ... at the beginning.
You should definetely get some more challenge into it, or it becomes boring after a while.

Good job, man

Very nice game, quite addictive. :D

I love that song. The rhythm, the continuity, the increasing eerieness.
Good work!