Neat location and castledesign. But allow my nitpicking: the open watchtower could use some ceilings for more walking area to watch over the frozen lake, some beds for the workers would be nice and maybe a way up to the attic. If I ever rebuild your creation I will also try to build 1 or 2 gatehouses for better defense. But it's always easier to criticize something then building it from scratch.
Adequate criticism is always good. Good points on your part, the watchtower could have used the empty space; I also couldn’t come up with a nice way to the top of the attic so I just closed it. Apparently I was in a hurry and couldn’t think everything through