The tech here is http://www.mobage.com/
But I digress. The parallax effect is the character and monster portrait - you tilt the phone at different angles and it's like you're looking through a window into a 3D world. As for the level of polish. A lot of it has to do with having extremely talented artists working on the project. Also having a team of 15 (at its peak), 6 of which being engineers, allows a lot of tech to get in to make things purty. And 7 or 8 months development on top of that.
@pitbuller - I believe that because the app runs on mobage, it requests access for all those things just in case your game uses it. Because it's backend tech every game could use one of those things.
@CommanderKieth - It's not like Scrolls at all, actually. No cards involved. More of a traditional RPG with nontraditional mapmechanics. The combat is also more like Mario Golf than anything. I think I'll be well satisfied at my new job as long as I keep doing game jams and things on the side. I have a friend who also left the game biz for this company and he loves it, so we'll see!