Your mission is to destroy whole city before your bomber aircraft crash. Tap on the screen to drop bombs on the buildings. You can only drop one bomb at a time. Aircraft losing altitude continuously, if you can not destroy the buildings fast enough it will hit a building and destroyed. At each level aircraft will speed up and lose altitude faster, also cities will be larger with taller buildings. If you make a perfect hit, very center of a building you gain more points and previous perfect hits will continue to add to score as long as you keep your perfect hit chain.
Game also supports a child mode, in which you are allowed to drop several bombs to make game a lot easier.