This looks like a really cool game, and it's obvious that you spent a long time making it. Unfortunately I'm having a difficult time trying to play the game because it's not clear HOW to play it! For example, there are four answer choices for each question but each choice is blank until I click on them. So, how can I make a selection when they are initially blank? Also, there are various things that require certain keys to be pressed such as "home" and "end" to start and stop a timer but you make no mention of them in the game. Suggestion: Place a text box somewhere in the scene that explains how to play the game and what keys need to be pressed for any special functions. I'm sure that most people trying to figure out how to play this game would appreciate some instructions!