Pocket Cafe is the best casual restaurant iPhone game. Created by an award-winning iPhone development team, the game is already more than one year in the making.This is you, you, you. Talk about me, me, me. In particular, "my" love of time management games.
Casual games is largely sold on the basis of art style (more photos!) and appeal to the customer's desire to live through the main character. You might want to consider naming that mascot of yours. I'd be thinking female names that wouldn't sound out of place at a PTA meeting in Kansas. (Look at your competitors: they all do this, for a reason.)
There is no reason to not have the call to action be instantly visible, above the fold.