Haha, brilliant! Endlessly entertaining, and the physics engine is highly performant. Good going, Unity.

Any chance for more vanilla towers? Or, perhaps, the optional inclusion of sound? I was thinking, like, clicks and clacks as the blocks strike one another or the ground above certain speeds. I assume that sound will degrade performance, though, and truly, this game lives and dies on its performance - so maybe just, more towers. Perhaps we could do with a more intuitive front-end to custom tower building, while keeping the backend. I have some experience, but man, this is kinda hard to figure out.