This was a first gamejam for me, and it was fun (also a lot of stress before the deadline ) to participate! Ill try to participate in more GameJams if it is possible a real challange and fun in my eyes. I feel like I gained a lot of XP in short perriod of time!
There are few things that bothered me, as few users already mentioned before.
1) Lot of us didnt know, that you can update your game after deadline (I found out this information today), it might be better to make rule list on one page from start to end of the competition.
2) Make the Rules more detailed or FAQ or both.
3) NG is a great website, however it would be awesome to get more feedback from players, maybe some feedback from judges themselves (but that would be very time-consuming, I respect that), But that is more or less critics for NG not Scirra.
Anyway great gamejam, cant wait for another Gamejam, best of luck to all participants!