The "Your work must consist only of text" bit seems definitive, but it still puts works that would benefit from a map at a disadvantage - think of Bookworm, for example.
However, this is the most problematic condition:
Works that include excessive sexual or cruel descriptions or depictions, infringe or are likely to infringe upon the copyright or other rights or interest (including parodies and imitations), slander specific individuals or groups, are offensive to public morals, violate the application guidelines, or are deemed unsuitable by the judges will be disqualified from the competition.
For one thing, JNC publishes JK Haru Is a Sex Worker in Another World, isn't that excessively sexual? And "offensive to public morals"? That's far too vague, which "public" do I not have to offend? But that pales into insignificance compared to "Works that ... are deemed unsuitable by the judges will be disqualified...". I appreciate that you need a general get-out clause of some sort, but it makes me wonder whether I should spend hundreds of hours writing something only for you to then disqualify it from competition because you find it "unsuitable" for some unspecified reason.