At times, the speed of the bombers will be very fast making it necessary to to aim at the front of the car. It is better to have an explosion as soon as you are close to the car than waiting.
Easier difficulty
Place your device on a stable surface and enlist the help of a friend. Have one person responsible for the top lane and the other for the bottom line. You still need precise timing, but will have less pressure to react quickly.
New bombs
Reaching certain score levels will unlock new types of bombs. This is just a cosmetic change and does not actually affect game play.
Timing
There are various types of cars and the more bombs will be required to explode them the farther you get. However, the bombs have different movement speeds, making it important that you always tap at the precise moment. Sometimes the first bomb that appears will not be the first to explode; sometimes you must tap two or three times.