Knife Jump

Can you jump your blade high enough times in this fun game to get to the top of the leaderboards? Don't go too low or high, just make sure not to hit anything. What are some cool things about this game that might entice you? How about if it was free for a limited time only and then suddenly went back up in price again? Can you make it all the way through without any power-ups thanks to these special items giving yourself an advantage over everyone else?