Its very visually appealing, but a lot of tiny things take away from the fun of playing it. One that really made it difficult was the movement speed of the player: as the base movement it felt a little to fast to move between bullets and a little too slow to move across the screen. I think having a fast speed and a slow speed if you hold another button would be most ideal. Another one is that some enemies would shoot you way past the point where could attempt to kill them. In shmups this is called the cuttoff zone or ceasefire zone.
I really like the ideas here, and the enemies have some very cool shoot patterns. The "choose your own adventure" aspect of it feels like a great idea for shmups, so kudos for that, but when it comes to the "shmup-feel", there is definitely room for improvement. Good job!