Really fun game, super well made, and very pretty. I enjoyed the bullet time and killing enemies and picking up their weapons. Oh, and dodge rolling.
What I would say is that the controls just kind of confused me. I get what you were going for with the mouse only controls, and I will say I got used to them after a while, but I probably would have been less confused if it was like, WASD to move, and mouse to shoot/dodge. Also, I don't entirely see the point in having to click to pick up items, but it's not that big of a deal.
Really great work here. A lot of potench, as Mark would say. Keep it up!!