Ya it is short that's why it was only 15 bucks. They said they plan on releasing DLC as well sometime in the future.
I'm still playing Bastion, which I think is a little short too, for the 1200 MP I used. Haven't checked out From Dust yet though.
From Dust was created by Eric Chahi. He is the author of the legendary Another World game, which he made entirely by himself (design, program, graphics, animations, etc ...) save the music.
Strange I have seen an average of 7.5 to 8.5 on most critics website. Player reviews are around 80% as well. Doesn't seem so bad. I will have to give it a try http://www.gamespot.com/xbox360/strategy/from-dust/review.html?mode=web Actually there is only 1 negative score. I read it's a solid 9-10 hours of gameplay. Seems worth it. Now if the PC version could finally come out...