I was really, really hyped for this one. A Change of Heart and Within Her HeART were amazing, and the teasers you posted had me salivating. I ended up let down though this wasn't any fault of yours- I'll get to this shortly.
The art and music are great. I really like the opening animation, although I'd seen that before it was a treat to see it again. The menu is also very polished and even has buttons that light up and make noise.
It is very small in my browser, so I can see why fullscreen is recommended.
I really, really wanted to play this game to completion. Unfortunately I never got past the first level. I do agree with Thoof that the heavy movement with a lot of inertia is kind of questionable given how precisely and quickly you need to move, though I think one could get used to it. I've also stated my thoughts on positive feedback loops earlier in the Discord- I don't like how starting to lose makes the game harder. I'm also terrible at bullet hells in general, so there's that.
That being said I think the gameplay is mostly solid. I didn't really have much of a chance to get used to it is the thing.
I couldn't play much because this game gave me horrendous eyestrain. I don't know why that is. The last game I played that did that to me was Zombie Driver- another game which I really liked but reached a point where I couldn't play any longer- and I have no idea why that did it to me either. I don't think it's anything you did, and I don't think the majority of players will have an issue with it, but I was only able to play a few minutes.
I'm not sold on the status bar moving from top to bottom, and I found it very hard to read at a glance, but again I didn't play much and... eyestrain.
Finally, June can fly now?
I still do think this is one of the best games in the jam, though I'm not sure if I should try to rate it because I didn't/couldn't play much of it.