Level 1: It's just intro bro
Level 2: Learn basics of jumping
Level 3 - look up when jumping, do some angled jumps to get through walls
Level 4 - Right side is your friend
Level 5 - Jump down a bit more often, don't be scared!
Level 6 - There's a heart which might save your run...
Level 7 - Pure skill test! Don't get fooled.
Level 8 - The biggest danger of this level is the island itself. It's so uncomfortable, watch your step and don't shoot the last kamikaze!
Level 9 - Finish it!