Great demo! I’m still griding my no-damage run, having a great time.
I would suggest adding some iframes so we don’t get hit by multiple swords in a single mouse swipe.
Also, I think it would be interesting if the red sword pattern had a little bit more space between each sword so we can micro dodge between them. It can be done if you’re far away from the top of the screen, but the hit marks are positioned to the sides, so we’re rarely at the bottom.
Another thing I would mention is that the bullets come from the top, but the gameplay area is horizontal, so it is a bit awkward. I think taking inspiration from horizontal shmups would be better, or changing the game area to 3:4.