These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Upgrade Complete
Most Annoying Sound: The upgrade shop has an annoying humming noise. You can make it go away... by purchasing an upgrade, of course.
True Art Is Incomprehensible: Indie Mode turns the screen black and white while displaying a series of subtitles on the screen portraying a conversation between two people (also being a reference to Final Fantasy VIII's opening, with the first few lines), one spouting off nonsensical, artsy one-liners, and the other getting more and more creeped out by the former until he threatens to call the cops.