Cool game! Here s something I didnt like:
You cannot kill the creatures which are hitting you tower from the North, North-East, North-West. I think its because they are too close, so cannons can't hit them, and they are eating you all the time.
Second one is the infinite camera shake XD.
I liked the cannon upgrades there are was really cool, animations and sounds was great too)

The visuals are very clean and the upgrades feel powerful. However, I think I might have encountered some bugs: I could still shoot after my tower crumbled, I kept some upgrades into the next run, and from the second run on, the health bar didn't work anymore. Also, you could just do nothing and still defend long enough for your advisor to win. But great entry nonetheless!

Beautiful game, good job!

Original gameplay, and well polished overall, congrats!!