No ads in this pro version. You have put on a crash hat when you play this game. Your mission is to build the blocks as high as they can go without letting them over balance. If you really want to reach a record level height, you will need to build out as well as up. Balance the bar with equal weight left and right to make the sky the limit as you build higher and higher. But watch out; everything can come crashing down in a moment and destroy the perfect tower.