Snow Tower (3D challenge by Kaino University)

I've participate in a "week-long" challenge from the online Kaino 3D Graphics University.
The theme was to model a tower with a gun on it, like in tower defense games.
I model the Snow Tower with an ice cannon on top of it.
I found out about the challenge on Monday, so there were only two evenings before the deadline. The idea was to use materials and textures from my previous project, Ice Dagger, as much as possible, save time on it, and focus only on modeling.