A Flappy-Bird-ish Bullet Hell? Sure, why not! I like challenging games alot! And this is definitely one of them. In fact, it's so hard that I couldn't finish it. However, this could also be due to post-jam jetlag.
Nevertheless, I would like to express one point of (constructive) criticism: For me it felt somewhat counterintuitive to use the mouse and arrow keys for the Dash at the same time. Maybe you can add the A-D keys as an additional alternative?
Still a really fun game! Good Job!
Cheers! - Sebastian