Oh gosh, I didn't realise that I had missed the change tool control out of the readme! Let me update that now, lol.
Thanks for the detailed review, and I'm glad you enjoyed it! If I had a bit more time I'd probably mess around with the lighting and/or shaders to see if I could get rid of that strange square shadow that you get on the snow. I messed up with the end screen because I was still working out how to use static images in Unity (it ended up as a material rather than a raw image), but I worked it out for the presents themselves so next time I'll know better :-)