Notice talk:Random Talk/@comment-5049273-20120626205448/@comment-5230117-20120628135606

it's to see who causes the most damage to the epic boss, not necessarily what level you can get to on the epic boss (since you can cause damage to the boss, but not necessarily defeat him.) You're going to have to spend money to get to the top 100 though... and if you can't get to the top 100, it seems like it's best to aim for #1,001-2000 if you check out the prizes haha (Menu --> Zombie Jombie FAQ --> Leaderboard.)