Beautifull for sure, i love the DA. And the music is for ever a masterpeace! Good choice :)
Regarding my feeling, I know, it depends on your player target. And for sure, I am not a hardcore platformer gamer. I am also playing with the mouse/keyboard combo that i think it is more difficult. But I find it a bit too difficult from the start. May be introducing your features (dash, attack...) gradually and same idea for the platform speed, from start a lower one increase little by little.
I notice a bug. I was stuck at the bottom left of the screen after a dash.