Fun idea, been through a few airports, so this is a good spin on a familiar activity. I did struggle to keep the motivation though, even with the different phrases you've implemented.
I'm aware of your reference to the sergeant, however it somehow feel a bit unrelated to the actual game - might have been better to just go all in on the airport theme. As others mentioned the sound got a bit annoying, and some of the objects were tricky to actually decode.