The code uses its familiar, now-iconic pattern for ... convenience. "Because I was the one who was going to be using it," Hashimoto said, "I made sure it was easy to remember. The game took around half a year to develop, and, at the time, putting the code together was like an entertaining puzzle. 'How on earth am I going to be able to fit these passwords into the program?' I'd ask myself." The solution to that puzzle may have led to your successful completion of Gradius, Contra, or countless other Konami games.