I found the controls to be intuitive, yet movement could be faster when your mouse is near the edge of the screen. Also being able to dash more than once would have been nice, feels a bit sluggish this way.
The music is well done, though it suggests a more fast paced game play than there actually is. If you'd speed up everything a little, maybe add some static obstacles and don't let the player die on first contact, you could increase the action a lot in my opinion.