The polish on this is impressive! Its of a level that is definitely difficult to achieve in such a short time so well done.
I enjoyed your twist on a tower defense game, building a little tower as enemies scale it. Great! Clever and fun.
My only complaint is I didn't really understand the tactical advantages/disadvantages of the tower pieces. Seemed like it was always best to just pick highest defense, and if they were even just go with tallest. Unless there was one with a special effect, in which case you pick that one.
Well done!