Pseudocode.

My game idea is called Math Racer.
Math problems move automatically from the right side of the stage to the left.
The user controls a car's up and down movements with the arrow keys.
When the car drives through the correct answer, the points go up.

Math problems appear on the right side of the stage and move to the left.
When you press the up button, the car moves up.
When you press the down button, the car moves down.
If the car hits the correct answer, the score goes up.