Okay, I was joking about the whole single plateform thing before, but now I can twist it to sound like a good idea
If a match goes on too long, and there's maybe two people left, you could activate a sudden death mode (this single plateform could appear above or under, or just be all of the seperate plateforms combined), and a timer shows up, counting down from 10 seconds. After about 5, the timer dissapears and now the two remaining players will have to keep counting down the remaining 5 seconds while playing chicken with one another, faking one out, and seeing who times their jump to survive the best.