@Taka: The way I tackled it was to send the villagers to the nearest totem and then grab the lava-repel music knowledge. Whilst you're sending your villagers off, take every one of those stupid water-bursting and explosion trees near the starting village and go throw them in a lake somewhere. I took evaporate next, as that (along with lava-repel) will help you deal with both the lava and the water. Then I got Infinite Earth, and raised all the totems above the typical level the lava/water reaches. The rest should be pretty easy, although it can be a pain in the backside getting the 100% trees with the small patches of lava springing up everywhere setting fire to everything.
So Journey is this year's Braid and Limbo, I guess. We can all self-wank over it to show how clever and diverse we are.
We still know nothing about the game and it looks only minimally interesting. It might be the greatest fucking thing ever, but none of us would know it, yet. We just know that it's the next hip thing to talk about.