I have just one word: insane. It's absolutely insane how you managed to make a game like this, so complete and polished, in a month. And it's not even short of mechanics and bosses: every one of them had its own unique ones, with attacks that changed the more you damaged it, making you need to adapt. I had so much fun defeating each one, it truly felt like a strategic experience of where to position yourself to get the best result, instead of just "shoot and dodge".
The graphics and ambience are just on point, just one minute and I was completely immersed in the game. Also, I'm quite a fan of "analog horror" media, the atmosphere reminded me a bit of those and I think this would go hard for other fans of the genre.
I also liked the story a lot, because I love it when an author tries to express something with their game, and ohh boy if there was something to be told. I already like kaiju, giant meat monsters and horror a lot, but I genuinely didn't expect it to go in the direction it took. I think the theme was a very, VERY bold one, expecially for current times, and I appreciate that a lot.
Overall: I will await for the sequel. Incredible job.
Just one thing: at the very start, I couldn't figure out how the game worked, because I fixated on the "enclosed" part of the sigil I needed to make, trying to figure out how a 2 point shape was an enclosed one and even if I was just looking in the wrong spot. I think in this case, a 3 points sigil as the first one would've been easier to understand, but that's just my opinion.