The game consists of eliminating the enemy ships by solving the mathematical formula and then clicking on the ship to destroy.
The formulas are addition, subtraction, division, and multiplication.
The results are always positive integers.
The statistics show the ships destroyed , the aliens that landed and the missed shots .
To advance to level , all enemy ships must be destroyed without errors, within 60 seconds.
Advancing level increases speed.
The formulas are addition, subtraction, division, and multiplication.
The results are always positive integers.
The statistics show the ships destroyed , the aliens that landed and the missed shots .
To advance to level , all enemy ships must be destroyed without errors, within 60 seconds.
Advancing level increases speed.
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