Rules: Players take turns eating apples by choosing an apple and then eating it, along with all the apples below and to the right of it. The blue highlight will show you which apples will be eaten. In this manner, players "munch" away at the board. This is where the game gets its name. Players must eat at least one apple during their turn. Whoever eats the poison apple, the red apple in the upper left-hand corner, loses.
FYI: The first player always wins (ie. the human), so long as s/he plays perfectly. So, don't accuse the computer of cheating.