Answer the problems on the screen. Click the green flag to start the game. The length variable is how many problems there are. If you get a problem that is impossible to solve, restart or keep going. Problems can be impossible to solve if the answer has repeating decimal digits that repeat forever. Num1 is the first number that Scratch Cat asks while Num2 is the second and last number that Scratch Cat asks. The points is the amount of points you have. You get 1 point for every right answer and -1 points for every wrong answer. If you get less than 0 points, your points will be set to 0.