The planet Earth is threatened and its mission is to calibrate the rocket cannons so that it may shoot the asteroids that are threatening our planet.
To calibrate the guns you must use the numeric keypad to solve the mathematical operation in the bottom of the screen; after putting the result you should hit the "Shoot" and if the result is correct shot will be fired on the asteroid and destroy, thus adding a score in bullet points and bringing out a new operation to be settled together with a new asteroid, but when you slice the operation, the shot will not fire and the asteroid will continue to approach, try putting a new result.
If you press any number by mistake and saw that the result set is wrong, use the "Delete" button to delete the set value.
Our planet has your help. Good luck!!!
Note: The game will receive periodic improvements according to his acceptance. Initially he only has the multiplication and addition operations and its various levels, division and subtraction operations are already being prepared, plus some other improvements, which will be added regardless of acceptance.