Hey Jess - what did you decide re. voice over or similar? Something to help your audience understand your 'seed' metaphor?
There is no voice over I was going to try and add sound that works well with it, maybe music or sound effects that links. or I might use minimal texts to tell the audience what it is and maybe what is going on, I have not decided yet what to do.
I think you need to decide asap, because one of the bits of feedback at the pitch was that audiences couldn't follow the action - remember, your prime job here is to educate by giving information away engagingly - and accurately. I don't want you getting feedback that we can predict - i.e. it looks great, but what does it tell us?