wow, the attention to detail and polish in everything is insane. my only qualm is that the font you chose (though probably a conscious design choice) is a little hard to read because of the tiny sprite resolution.
oh yeah, and do you have an estimate on what % of the game this demo was and how much of the game you've already made? if you can't reveal that, i totally get it, it's fine. anyway, props seth and good luck with your project!! i can really feel the love being poured into this.