+/-, I really really started working on it in 9th December. But i haven't worked on it everyday until the jam, but no, it was not a weekend only game, i had already a good pre-alpha and i decided to join the Jam to speed up the release for the Alpha. I did and im proud of it
I never spent more than 2h on it in the days i was working on it. Unity gets me so stressed with bullshit.. i imagine if UDK, Frostbite, IW Engine, gives that kind of crap, like "too many pairs created, ignoring new ones" (pairs as in collision pairs)
I have honestly never used Unity, although I have been tempted. But I largely gave up on 3D game development long ago for personal reasons (I at least have a chance to create sprites or have them created for me, but with 3D the bar is pushed too high)