Okay.
The reason the number is 111787 is because you're dropping the "19", not because he made a mistake with the date. It's just like how you'd write 11/17/87 instead of 11/17/1987. Although I agree that it's a little dumb he did it like that.
Anyway, okay game. Not as good as the third and fourth ones, and not as good overall as other games of this genre, but okay.