I'm not sure who this game is aimed at, but if you're trying to teach cognitive biases to people with no training in psychology you really need to add a tutorial to the beginning. I would have loved to go further with the game, but I became frustrated at the very first question when I was confronted with this:

"Drag down the circle so that your belief covers all answers that you think are reasonable. This diagram is your belief graph."

I have no idea what a "belief graph" is, or how to use one. I though I had answered the question by entering a number into the field, but then I'm presented with this strange graph.

Perhaps I'm in the minority around here when it comes to my knowledge of this domain, but if this is a game intended for laypeople, you need to be really clear and assume I know nothing at all about your methods and practices. Explain to me what a belief graph is and how to use it. Either have a pre-game tutorial, or use tool tips.

That's my 2 cents.