Thanks for the feedback!
The scroll thing is intentional — it only moves you a little. I tried a version where the character follows the mouse, but clicking as the main input ended up being more fun, so I went with that.
As for the sword delay, I'm not sure exactly which part you mean, but it might come from how the attack works — the trail you leave while dashing is the sword, so the hit comes from the movement itself rather than a swing. That might be what makes it feel slightly delayed. I'll take a closer look at it.
The idea about the trail merging when you close a full circle is a really good one. I'll give it a try when I update the game. Thanks for playing!