Right & left arrow keys to move, space to shoot. The computer will give you a question (top left corner) and you have to shoot the correct answer. The two variables in the top right are the question number and time you have left to answer the question before you lose.
This is a project for the "Math is cool" contest at Russian School of Mathematics. There are a few glitches that I don't know how to fix (sorry!) :/ The music is 479319_-Electroman-adventures- The music is not mine