I really like the theme and gameplay although I feel combat is little unresponsive. Maybe have the projectiles shoot out from the player sooner, if not instantly, after pressing the left mouse button.
Also when I press space I'm instantly teleported a few metres above the ground. If this is intended then I wonder if it instead teleported the player a few metres in the direction your aiming, like Dishonoured's blink ability.
Hope to see more, keep up the good work.