Goal of Add It Up is to select numbers that add up to the target sum. You only have a limited amount of time to do so. The more numbers you select to get to the target sum, the higher your score will be. The faster you solve a sum, the higher your score will be.
The game is about a crazy adventure of a dog that goes out to know the world and finds many enemies on the road and drives an airplane and becomes a ninja to get ahead the game is very fun and addictive.