The thing is, there will be no adventure, because serious playtesting requires technical knowledge of what is going on. You are not being paid/contracted to play the game and enjoy it, you are doing it to nitpick all of the glaring flaws in the game design. And that's after you've tried to find all the glitches and bugs present in the raw, untested code. And that requires constantly doing the same thing to see if it triggers anything. Repeat ad nauseum for just about everything in the game, and it will lose it's wonder and adventure pretty damn quick.