Thanks a lot for the compliments!
Frankly I'm also surprised at how well we did. One fact that helped for sure was that we were in vacation and worked all day each day on the game (else it would've been absolutely impossible).
We also had quite a clear view of what we wanted from the start (though some things did change). In short, I find we were very productive and lost very little time.
I personally had no experience in this kind of game, though of course generic Unity knowledge helped a lot (scene management, audio management, UI etc...).
I thought I had played all web browser entries, but somehow I missed yours? I'm gonna play it right now!