I wasn't exactly sure what I was supposed to do. On puzzle 3 for instance the bottom word was NINE. I tried BONE, VANE, NONE... all valid words but it wouldn't advance. Is there a limited pool of valid solutions?
That said, this was a beautifully done game! The letter changing animation with the ASMR sound effects was very satisfying. The ambient crowd murmuring you'd hear at an airport on train station... everything was very well curated. For that you did a great job on the presentation and overall vibe!