if you make it to the last level way to achieve 7000 is to use the accessories in correct order - freaky then thrust straight away then bounce on your skis, repeat this process 3 times - if you're short against 2400m or 4800m people use freaky and thrudt - don't worry too much about upgrading gun pwder until final 1 or 2 levels - my best was 7917 - unfortunately as i play this at work cannot get the achievements!
 "Micro Olympics"){kind=icon}
 "This is the Only Level"){kind=icon}