New idea: Basic arithmetics

[AkshayAgarwal007]

With reference to the issue #40

Category speed

Purpose: A game to improve basic arithmetical skills. We need this till we have an online version of TuxMath.

Game: Answer questions involving basic arithmetic as fast as you can. Avoid collision with moving plants as Tux has only three lives. Wrong answer earns -10(if score is not zero), correct answer +10. Complexity(difficulty of questions as well as speed of plants) increases with level. Also the arithmetic operations could be any, not necessarily addition.

A few snaps

In the second pic what looks like a blast is just an animation when the plant disappears.