So, before anything else, I will admit that the problem your hitting is my fault, I forgot to include a thing saying what number system to answer in. But you answer all questions in decimal, so instead of 1111, you would answer 15. Again, my bad there, and when I make the updated Post-Jam Edition, I will be correcting that mistake, and being as clear as possible at the fact you answer in decimal.
EDIT: After being informed I can do so, I have chosen to edit the game page to mention the need to answer all questions in Decimal.