Since you noted on Discord that it might be awhile for the final release, I went ahead and tried the current version.
First off, really great menu and title screen! Gives a great first impression, tons of options, all slick and professional looking. I tend to neglect this in my games... this menu makes me want to try harder.
The artwork in game is nice! I like the character sprite in particular. Her "defeat" is hilarious! (I saw it plenty of times, even in baby mode). The backgrounds combined with the sprites give a cartoon look that I like. The brightness of the colors don't bother me, but it is maybe a little busy during the dialogue scenes. My only thought/suggestion there would maybe be to dim everything during those parts, except the dialogue and big character portraits? Even just a touch might help. Kind of like what it does when you access the "pause" screen, but only on the stuff behind the story elements.
The music was all great, enjoyed that a lot!
The tutorial was thorough, but it was a tad confusing at times. I really had to get into the game to "get" it. But I still prefer this to a controls pages, so it's a plus. The dialogue was good, but maybe a little dense/long. Story-wise, I'll need more to really judge it... but it's off to a good start! One other tiny nitpick on the story scenes, the whole dialogue box blinked every time I advanced text. Hardly a huge issue, but it did catch my eye.
The gameplay was solid and enjoyable, even though I stink at it! I'll admit, I have VERY little experience with bullet hell. I played Ikaruga years ago, and gave up on the first stage I think.
The mechanics were interesting. At first, I barely used them, but with practice they did become helpful. The tunneling in particular I used a lot. I found the "wave" attack only useful on the bees, but perhaps it continues to be of use in later levels. One thing that took a lot of practice was using the mouse wheel to aim... I got better at it, but can't say it felt natural. I would have preferred just using the mouse pointer to aim. However, I didn't realize that there might be a control scheme I like better until after completing the demo. I did go in for another round with a different one selected, but the game crashed at that point. (Ok, I did go back and try one other control setup on a fresh start, but it still required the mouse wheel. I did way better on the second run though!)
I'll definitely be back to play the full version. Looking forward to it!