My first reaction: "Nightmares"? Are you sure this is not a fake city inside a corrupted soul gem kept stable by incubator's seal? /人◕ ‿‿ ◕人\
This is... a very great submission. Decent art, great levels, great storytelling. Also the music... @FacemeltingSolos? Such a good composer that you got there. Also, who did the voice acting? While it's not Japanese seiyuu tier it certainly is a nice detail. Can feel all the time and effort put to make this. Love it. Very well done. :)
If there is an improvement that I can recommend though... maybe you should separate the jump and guard button from the arrow keys? It's fine as it is, but I think it'd be better if they use separate inputs.
P.S.: I hope you read this before the submission closes, but can I have a .exe version of this game? It seems Win + G cannot be used for browser games. I think I want to try to record playing this game to make a "Let's Play" out of the submissions to this jam ;)