After much hesitation I decided I will make and release an expanded version of this level, which will be titled Pestilence 2.0. It will do away with the plot I described in this thread, removing the fish and the teleporter entirely, provide all-new, very abstract, endings, and will feature at least one new area, and new music.
Normally I don't like continually reworking older stuff, but I can't help it; ideas for this expanded version just started flowing in, and at some point I couldn't resist anymore.
Also, in case anyone was watching the topics I made in the Previews section, most of those levels (Silly World, Complacency, Winter World,...) are still being worked on, and by no means abandoned. That said, I'll probably release Pestilence 2.0 first.