SMB and SMB3 both have infinite life leeching points, Tommi. I believe one for SMB is in World 3-1 (one of many!), using a turtle shell to accumulate points/lives, and there's one in SMB3 where you are essentially thrown an endless supply of lives. Any vintage NES player knows this. Most also know how to get to MinusWorld, where you could theoretically score an infinte amount of coins (Pipe trick at 1-2 if I recall)(posted 9227 days ago)Now, seeing as how I don't want to propose an infinite amount of rules, the games will be played with 1 coin, as everything else at MARP is. The timer can probably be upped when the dip switches are labelled, as I've been told by a few people that the initial time limit can be changed via dips.
And if two or three PC games are allowed, I certainly can't see restricting play on any of the others.