I think you've got a potentially great character controller here with some cool movement tech. I also really liked the graphics and general style.
I think the camera needs tweaking a bit as in tight spaces it has a tendency to zoom in and out very quickly which can feel a little nausea-inducing. I also can't tell whether this a purely visual thing but the character can look like they're 'slipping' when moving around.
I assume there's no sound but there is music, however when or if it plays seems to be bugged. I think I heard it once for a bit. There seems to be no way to recapture the mouse in game if it becomes free. Also I don't think you should have had Ctrl for one of the controls as Ctrl + W is a close tab shortcut for Firefox at least which tripped me up more than once!