Maths Addition And Subtraction

It has two options addition and subtraction.
User can select one option at a time.
User needs to shoot the right answer as per the number which is showing in the screen.
If the answer is right then the rocket will blast and it will update the score.
So while playing, User can solve the sum with perfection accuracy and time limit.
There are ten rounds in one level.
Game will go into the next level once user complete the 10th round of specific level.