MathPup Defense Rounding

The Snow Noids are trying to take over MathPup's fort.  Help MathPup fight them off by using the snow cannons along with your rounding skills.  Don't let them get past MathPup and watch out as on later levels they start bringing shields!

Just move MathPup to a cannon in front of a Snow Noid by clicking on it. Then press the number that rounds to the number the Noid is thinking of to knock the Noid back where it came from.