Epic
The only word I can think of, I don't know where "epic" falls on this scale, but I'm sure it's up there :D I loved the first one and this one is simply awesome and is quite possibly the highest rated flash I have ever seen. I don't know if you're taking suggestions, but perhaps different units of measurements could be included, I'm so bad with metric measurements, but that doesn't stop me from enjoying everything and I'm happy to help keep this super epic score this has going :D
Maybe even some speculative items, like the idea that atoms could have other universes or showing whole universes grouped together like galaxies are, maybe even dimensions, the possibilities are endless, like the imagination.