It seems to be more like an introduction to Bright Memory: Infinite. Might as well be a free demo or something. However, you get it so cheap - especially on sale - that is it amost free, so I think it is fine. About the game, you play as a cute girl who basically destroys everything that moves using a gun, a sword and some special device. I would not give it a top rating, because it is rather "dry" (uninteresting), but I recommend it nonetheless.