It's quite a good game, very atmospheric but not very scary. If the player had less health, an uninfinite ammo supply and enemies could chase after the player rather than following set routes I think it would be a lot more scary
What I would do to improve it:
1 - Give Players arrow keys/WASD controls...it's too much of an awkward leap to quickly go from spacebar to mouse.
2 - In the graph show all heights so that players can get more of an overall sense of improvement
3 - If players hit a pad while ascending then they crash, that way there would be a little more skill involved
Pretty awful, as blazeilev said, the questions repeat way too much, you should keep track of which questions the player's already been asked. Also, some of the questions get cut off by the textboxes which arent big enough