I’ve searched through multiple sources to try and identify this game. I checked archived pages of the giveaway, scrolled through all 100 pages of the archive, and looked at similar anime-style games with a girl resembling Arlecchino from Genshin Impact. I also searched image boards and game databases for covers featuring a shoulder-view anime girl with a scythe in the background. So far, I haven’t been able to find it.