That was one of the funniest things I've seen in a while. I loved how after it was over, I had to do it again because I had no idea whether or not it was actually interactive.
If every single game trailer was like this (in terms of interactivity, not the thousands of mandatory clichés,) I'm sure there are some games that would sell a lot better.
You've hit upon a good idea, and it would be interesting to see an actual game trailer that was nothing but microgames.