yeah alot of people had a problem with that level, so basically you gotta walk into the divet and while the invis guy is falling then you jump then you have to time your jump so you can jump off the invisible guy in the air(this is also how you beat the third level). Or you could get the invisible guy next to the right wall then when you jump you can just go to the right and you are on top of him and you can jump off him (even while in the air)