Cute game.
I really like these little customer service games. I agree with another comment that sometimes I just kept guessing what the combo was, especially when they liked things "old" there were a couple options, so I would just try them all.
The only other little thing, is that the text was big and at the bottom of the screen, so while reading it I couldn't really see the component it was talking about. Maybe put the text in bubbles next to what it's telling you about? I don't know. Not that big of a deal. Just a little thing.
Otherwise, really well made. Worked smoothly. And a nice take on the theme.
D