The visuals are actually pretty good, while the gameplay could use some work. The game is a bit confusing, since you don't really know what to do.

I suggest you add a tutorial at the start to tell players what they should look out for, make the projectiles (the sins, cos and tans) more eye-catching so people can spot it more easily. Or maybe you can try to change the gameplay and make the teacher look at the student at random instead.