Answer: The file size is going to go over 50 MB. The other answers are valid too, though you could play the music as an external sound, to reduce loading time, but by going over 50 MB you would then cut out potential sales from people who are connected by cellular and not wireless networks. At the time of writing, all of the stores require that you be connected via wireless if you intend to download apps that are over 50 MB.
Answer: Lemon Cheesecake. The pattern, if it isn't obvious, is that the code name takes on the next letter of the alphabet, is a kind of food, but more specifically it's a dessert food. "Munchies" almost works, but "Marshmallow" or "Meringue Pie" would be better choices!
Answer: Hunter Mountain. Although not publicized, Apple does use code names for each version of iOS. Previous examples have included Big Bear, Apex, Kirkwood, and Telluride. These, and all of the others apparently, are ski resorts. Hunter Mountain is a relatively small mountain (3,200 feet), so if it does get used perhaps it would be a minor update!