I like the sound design and the game's art style. The character design is fun too. I did die though, but I wasn't entirely sure why. I think something to help the player prepare for the next war event - as well as knowing when that is - would be a helpful addition.
This is probably also way out of scope for what you may have planned for the game, but I think some kind of minigame or something similar to let the player play as Anya instead of observing her actions would be a welcome addition. But then again, for what it's worth, I've not played many visual novels.
Overall, a very interesting entry!