I like that the goal you are defending is also responsible for defending itself! It's a cool twist on the tower defense formula. But the bricks could be kind of unruly. It's kind of easy to knock the tower down while you're building it. The only way I could beat the final level was by holding the Ten Commandments on a brick and holding up the brick inside the end goal for thirty seconds. It might help stability if the brick you were currently holding couldn't affect the others. Or maybe parts of the tower could lock in place if you successfully complete a wave? Then again, it can be fun and hectic to have a heap of bricks.
The art was also gorgeously done!