Grandpas Revenge

This is a game where you solve math problems as fast as you can, to reach the end. If you solve the problem in time, you will move forward a step, if not, you wont move at all, if you answer wrong, you will move back. If youre doing well, the game will decrease the time limit, if not, it will increase it. You can see the time limit next to the problem, and the time youve spent. When I asked my mom what I should call it, she said "Grandpas Revenge", I have no idea why, but I couldnt come up with ...