Neat! The rumble as feedback for when a pillar falls down is good.
I wasn't entirely sure what the purpose of the people/pawns was, seemed like they dropped a more-red intestine when hit by debris?
I do think it could help to have a clearer objective since if pawns getting hit is a positive thing, I'd want to let all but one tower fall. In my mind, I'd only lose if all towers broke, so I'd have no motivation to focus on more than one tower.
Interested in seeing where you'll go with this!