For those who struggle on the maze part the first two digits of the code is 31
btw if u read the book carefully there is actually 2 ways to get the code. First way is by looking a the numbers on the right of the book and for the number that is missing in each paragraphs you have to input the number in the order of the paragraphs (for example if 5 is missing from the second paragraph the second number of the code is 5). The second way (Easier) is to look at the serial number of the robot (when you take the book from his hands you can see it).