Move 1, [Timeline, 0:11],
In this version, it all begins with White moving his g2 Pawn to g4 ... Black seeks to occupy one of the center squares, by moving his e7 Pawn to e5.
White's not played a wrong move at this stage, but has ignored more efficient first moves (e.g. 1. e4, 1. d4, or 1. Nf3).
Move 2, [Timeline, 0:18],
This is White's FATAL decision: moving the f2 Pawn out to f3, which leaves his King totally exposed. Not only that, but none of the surrounding pieces are able to move into position to protect or neutralize what comes next ... Black brings his Queen all the way from her starting position, to h4 and in that swift, 2-move sequence, it's Checkmate (#), Game Over!
Black Wins (0-1).
And that's the 'Mate of the Fool. Typically, you'll only see this happen in games between an experienced player vs. a total beginner - don't let this be you!