Hey, you! Thank you so much! ❤ I quite like the idea of the creepy ambient music starting later... I'll see if I can implement that in the final build!
Also, Kay stating that their model is the newest one serves the purpose of hinting to the player that Kay's spirit is frozen in time. The model that he believes to be the most recent one (HBS-10) was released in 2010, the year of his death.
If you haven't yet (and want to), you can read the story linked to the game by clicking here =D