Wow, this is pretty polished and i would've thought this is a finished game from everything i've seen.
I'm not good at these kinds of games, so you may disregard my gameplay notes. I thought changing speed would have more impact on the up/down movement, so this function seemed somewhat redundant.
I also realize that 1-hit-death is a conscious choice, but as a shmup non-experienced i've found it a bit too hard (yeah, i should git gud at that bursting thing, i know)
Overall real great experience.