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The only thing I hate about pages like this is that they hijack the browser with their fake history. When I press the back button from this page I want to go back to your homepage, or back to HN. I don't want to have to click it 20 times to get back to where I was. Playing the presentation in reverse doesn't even make sense so it's not a use case you should design for.

I felt sick after two transitions. Why would you create something that triggers potential customer's motion sickness?

I think this presentation/page isn't simple enough. You use too much different fonts and styles (there are slides with regular, bold and italics style in one sentence). I liked the rocket-shape of presentation though. It's just my opinion, I'm not an expert.