You know, I really am not sure on that. Did you try actually just putting a space in the address you typed in, where your name goes? I'm not certain, but it's worth a try.
There's nothing wrong with it. If your Tamagotchi has been yawning, you can put it to sleep early by turning the lights off. I don't notice that my Tamagotchi has been yawning, most times, but it's not weird to be able to put them to sleep early.
Those prizes are items that go into your 'souvenirs' list. You can't play with them, which is disappointing.
However, if you use codes to buy items from the mall or food court, those items are usable ones.
OH. I forgot something! If you open up your tamagotchi, but then don't screw it back together tightly enough or don't line everything up right, sometimes the screen may not work properly or at all, because it isn't pressed securely against what it needs to have contact with. I've had this...
The point of 'scratching' the semicircles is actually to color them and in between them with graphite (pencil lead), in order to connect them with something conductive and complete a circuit. Actually scratching any part of the insides of a Tamagotchi, particularly with just any old tool, is...