For someone who doesn't know much about Touhou I was surprised when I saw that the first game in the series was very different in comparison to the more "shoot'em up"-like games that the series is known for. It still is in a way a danmaku/bullet hell game though.
I thought that the music was quite alright and the gameplay was pretty solid but I definitely think that the whole throwing that yin-yang orb around definitely wasn't the way to go, since it adds quite a bit of randomness into an already quite challenging game (since you can only interact with the playing field with this said orb). Nevertheless, I had quite a lot of fun both with bosses and normal stages. I even liked the (to be frank non-existent) story.

I think that for the first game in the franchise it's definitely an alright game, but we'll see how it holds up in comparison to what will come after it.