lv 12 there is a glitch to where once you get the bonus you can just jump in
but its really easy to get down there just stack 2 miners on the opposite side of where you start and then jump off the stack when you stack the 2 make sure you put the lower number on top other wise when you switch it will knock off the top guy unless you hold the down button when you switch
the game is a simple flash game and you can make one by having any black area hyperlink you to a you lose page and the red area to a you win page and he/she could make the game longer by putting a continue page to the next level or a quit to the menu and repeat over and over