Each jump has three platforms, and you can make it through with just the middle platforms. You need to time your jump well, but it can be done.
I've also found it beneficial to keep the shift, arrow, and jump keys down for the entire jump. It feels like it helps you jump longer, although I've never really tested it.
There's a solution to the puzzle in the Best Tips thread that explains how to do them all. I usually never have enough patience...
And the benefit to looking up is that if you fall a bit short, you might still be able to climb up the rest of the way. If you're looking down, you can't...
One final thought... Mama Hissy's advice is always worthwhile on this one. Save early and save often. I generally save after every successful jump. Few things are more frustrating than falling down on the last jump... [img]graemlins/madhell.gif[/img]