As far as I understand it, this is a demo.
The full game has been available, but you have to buy it from Nokia. Not sure what it's playable on, I'm pretty sure the N-Gage is one device.
As far as I know, we probably won't ever see any more of the game on this site for free. It's quite a tease.
I'm almost certain the full game would have gotten a 10 from me. As it is, too short, this part lasts about 15 or so minutes if you take it slow, listening to, and looking at everything. I'd hope the full game takes about 2 hours. If so, it's probably great.