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.
Blue and Orange Morality: Technically minus is a child, so doesn't have the same concept of moral responsibility an adult does, so does things which might seem like Fridge Horror or Disproportionate Retribution to adult readers. Possibly also justified given her reality-warping powers are pretty limitless and that she can also see ghosts (hence, death probably isn't a big deal). The closest it comes to any sense of logic is: minus just likes to have fun regardless of the consequences, and doesn't like it when things get in the way of that.
Germans Love David Hasselhoff: The webcomic is apparently popular in Japan, enough that Ryan Armand drew a few extra strips in manga style with all the text in Japanese, which is not translated anywhere on the website.
The red-haired ghost. Like most characters, she is a Foil to minus, in her case showing exactly how irritating minus would be if she were knowingly a Jerkass rather than just one because of her general ignorance. Just like the white-haired girl, she is also responsible for the aforementioned spoiler. However, she is Rescued from the Scrappy Heap starting in strip #116.
minus's perpetually offscreen mother does not start out as this trope, but falls headfirst into it as soon as the readers think that she has gone too far in yelling at her, namely, in this strip where, after yelling at minus, she slams the door in her face. It's really the fact that she is an authority figure that makes her this trope, as some of her behavior is borderline abusive.
Shocking Swerve: The climax and ending do come right the hell out of nowhere.
Tear Jerker: Someof the strips may be this, though it might as well overlap with Nightmare Fuel and Heartwarming Moments - you'll have to use your Fridge Logic there. The strip about the meteor is kind of tearjerking, if you take the time to think about what would happen if minus didn't hit the meteor away. The expressions of the people...