Well, this is epic. A magical girl retro-style FPS with a complete and interesting storyline, multiple endings and a good 30+ minutes of runtime. The game was relatively easy to pick up, and I was able to get through the whole story without any issues or inconveniences. That's seriously impressive for a jam game. It isn't quite as streamlined as a typical console game though, feels more like a PC game, with its README files and extensive graphics options. Bonus points for 144Hz support :)
The narrative style quickly grew on me. There's a lot of character in how the characters speak. Much of the story is really interactive (and I'm not talking about QTEs, not that they were egregious in this game). The gameplay is good, having played a few FPS games I felt right at home with the controls and most battles felt fun and not too drawn out. The story is so good that I won't talk about it, you should just play it yourself.
Visually, there is a lot of care put into the world, with tons of props, good level design and even visual gags. The characters and especially faces might be an... acquired taste. I think many people will not be able to get over the faces, and that's probably what's hurting this game the most. So that's the one thing I suggest working on.
I had not played the previous games, but I got the good ending. I enjoyed it and I'm happy to have played it.