Very nice style. I like the speed movement, but it would be great to add the option of increasing the mouse sensitivity.
I did noticed two details:
- The camera seems to be jittering, which means that the camera position is being changed on Update and not LateUpdate. Let all the position of game objects at Update and in LateUpdate you set the position of the camera, and the jitter should disappear.
- The colliders for the enemies look a little bigger than the model, and shoots at their sides also hit them.
Pretty cool demo :)