Hi!
Funny! And bloody.
Controls were fine although it took me a while to get used to it and I actually did not figure out how to move the camera the way that you show in your post. But that was fine.
I liked how everything moves, however the game did not keep me engaged for long. Very fast I did not care about what is happening at the bottom of my tower, I was just focusing on placing top blocks and occasionaly moving the builder up so he could reach (did not notice any other rules for building). The three guarding amigos seemed like my attention would hurt them more than it would help, and otherwise there was nothing else to do.
Maybe give me some magic so I can smite those demons with my personal lighting bolt? (that costs mana that needs to be earned somehow?)
Now that I think of it, there was also an unexpected lack of threat - even if I had a lighting bolt, I would not need to use it, as it seemed that even a single amigo would protect the tower without breaking a sweat (I definitely did not get that far to see the demons actually hurt the tower).
I think it's well done and I like the funny style and animations, imho it just needs a little more interactivity.
Good luck!