It's pretty neat, retro feels!
A mix of a rail shooter and one of those first person shooters where you point your gun at criminals while sparing innocents.
The gameplay concept though, it kinda... shoots itself in the foot? Somehow I didn't see much point in shooting and stopping to reload if you can just run past enemies and around bullets, so that you can outrun your partner. Whether I was hit or I "didn't play as the game intended", I just didn't feel any penalty for that - I'm not sure if that's what you wanted for the game.
It doesn't help that I feel like spellcards don't help that much - I had run over innocents with Meiling's spellcard, and Sakuya's spellcard accomplished nothing much for me?
(I don't quite understand what Sakuya's actually does, though I did somehow snipe innocents that were probably too far for me to even see lol)
That said, the gameplay feels fine and very responsive, I did feel like an action protag while playing the game, bang bang bang!
I also appreciate the balance given to the partner - I was worried I'd be outdistanced by stopping to reload, but it turns out it's fine. I also noticed there's rubberbanding on the partner, good thought. (If you're wondering, I spent an entire game as a pure pacifist lol)
The style is so nice too!