No problems on PS3 demo. I know with other games people have managed to get a refund off MS when it's proved unplayably bugged, although in the good old days of console companies actually having a QA process they never had to worry about that because they'd never let a terminally bugged game through...
I like the demo. It feels very like a classic Bullfrog/Lionhead game, with a very Black and White vibe. The physics aspect isn't as technically impressive as I was thinking it would be. Seems to be height data with 2D physics, turned into a height map on a fixed mesh terrain. So there aren't pretty little channels cut through the sand when you dribble some water on it, or even tides washing away the coast. It also doesn't look as pretty as I hoped. The tropical conversion is quite muted, and not full of vibrant plants, and the textures are remarkably flat - not even normal mapped. The people also mill about aimlessly and are a bit stupid. They want you to make them bridges, but they're quite capable of swimming the channels you have to fill!
It is a good gameplay mechanic at a pleasant pace though, and with a happy, hippy vibe. the 'ethincity' works extremely well. I hope the game sells well and a full disc version of this concept with higher production values is gviven the go-ahead. I want to see inteligence in the people with jobs for them to do (Black and White, Settlers) and richer visuals. Very pleased to see a proper god game back though!