Thing is, I've tried that quite a bit (you should see the body count on the floor ) and still haven't gotten it. I'm not gonna give up this close to the end, though.
I'm also in level 22 now. There was an instruction in the previous level that you would have to press up-arrow while grappling to get to high points. Basically when you've passed the lowest point during grappling and get to the upswing, press up-arrow and release immediately after that. So much about theory. Obviously getting the timing right is the hard part.
Level 20 was fairly simple when I realized that you don't have to hold direction keys to wall-jump (but like you said, it does help you go farther on those long wall-jumps). Yeah, jumping straight up from the grapple is apparently what you're supposed to do for 22, but I haven't quite found out how yet either.
Wah?! I just couldn't get past level 20 last night.. Gotta try again. Took me a while to realise that you can jump much further when holding direction keys while in the air. And one thing I still haven't figured out: Apparently you can jump almost straight upwards from the grapple. No idea how yet.
°flash game°puzzle°platformIn Liferaft:Zero you guide young girls through a series of sadistic experimental setups, concocted by a group of scientists who watch you from behind glass. These scientists project instructions and some messages on the glass pane for you. But otherwise they just sip a cup of tea while watching your little girls die horrible deaths in spiked pits and other devious traps. Similar humour as in Portal Flash and good platform fun.