Well, when I left it, the game had an engine in it that was around 5,000 lines of code, and I had written well over 10,000 lines myself.
Honestly, it doesn't have to be that long, for I began designing it when I was first learning how to code, and there are short and more easily read ways of doing it. But it still couldn't reduce the lines to below 10,000 without sacrificing a shit load of speed.
Besides, if he could code it with his eyes closed, than how come I only see map that are far more simple than MM&M? If a guy wants to talk on the internet, I'm not sure why you're listening if he can provide a map to prove it.