You do regain your health when you pass level. There's also a checkpoint after each level, there are only 2 of them though. On stage 2 there's a tutorial on how to fight.
There are levels because it's a rhythm based game and each level has a unique song and beat, a endless stage would get pretty repetitive. This is also the reason why there aren't checkpoints mid-stage, they would break the flow of the song.
A shame you didn't like it, but it is a pretty hard game and not for everyone :(
oh, but why i die then i respawn to first level?
need a better way to see level progress, not only the progress bar(which is useless, its dont really show how far you get, only show sublevel not show level progress)(the even worse thing is last sublevel of level 1 dont have a progress bar, so you dont know how long u should survival)
4/5 now, i will try to get level 2 this time
edit 2: need a option that allow you to suicide by press a button and skip the spawn waiting
edit 3: at last level, im not attacking and dashing (cuz timing is hard for me), im playing it as a very low framerate bullet hell game lol (and its still doable and easy)
