This definition just makes the issue even more ambiguous, and the argument even more fallacious. The rules, in a game like basketball or baseball, are set up by some outside committee. This committee exists or has existed, and this is rather obvious. Spectators are people who come in for the sole purpose of observing said game.
You think you can equate this with the rules "laws" of nature, and the spectators (who?)? That is ridiculous. Here's why:
1)There are no spectators, you haven't defined them. If life is a game as a general rule, there must be a spectator in everyone's life. Besides crazy psychotic killers who might keep people in their basements for long periods of time, I know of no one who would care to do nothing but observe someone else for their entire life. Just because people exist around you doesn't mean they are spectators of your life. Your 'definition' is still insanely ambiguous.
2)The rules have two different origins. One is human made; the other is natural law, something not arbitrary. The two "rules" are different. You've just committed another fallacy of equivocation.
3)Games are played to achieve some end; which is also defined in the rules of the large majority of most games. Think about baseball: people have a set objective: hit the ball, round the bases, score a point. In life there is no objective rule to follow; the best you could do is "pass on genes".
You're still ambiguous; your "argument" still fails.