The beginning sounds like a touhou song with the chord progression, but it starts to shift the the sound of a modern era song, which IMO doesn't have the touhou feel. It has the notes of a chill bgm track but the drums and maybe the sounds make it too high energy to really be bgm. I don't know your intention with the song but I just judged it as if it were an attempt to create a song that sounds like it is either A) a song from touhou or B) a cover of a song from touhou.