I completed scenario 14 with just one minute to spare. Hurrah! That turned out to be the last scenario in the Adventure Story, and so I got the completely hatstand end of game sequence, and then it was all over.
Well, all over except for the other scenarios, of course.
I tried the Survival scenario, and got a Silver time of 14:36. I’m betting a Gold time was 15:00. That’d be about right. I then had a go on a sandbox level, and built at least one of every expansion possible. OK, so it didn’t earn me anything, but it was ace anyway.