I haven't really played horizontal shmups so I don't have a professional opinion but I like that the two shot types are more effective against different enemies not because of hard-coded stats but rather their positioning.
Though I think there's a visibility problem with the first shot type, I struggle to see my hitbox while holding down Z but other than that I'm really looking forward to a full release!
Also I think BIG mode would work cool as a stage gimmick or a power-up, like you could have higher damage but also you would have to deal with a larger hitbox.