The ability is fun to use but could have some small quality of life changes to make it smoother.

My suggestion is to make it so that holding E gives you a vector targeting arrow (pointing away from Mars in his facing direction) which you can use to rotate (turn) Mars on the spot, then when you release, it locks his facing angle. So any time you hold it, this is the mode you go into, but if you press it, it's a toggle on/off like currently.

It just feels a bit too clumsy to try and adjust your facing during fights by turning, especially when your cursor is being used for point targeting for his spear. You often get some goofy angle that isn't what you wanted just because he turned at a slower or faster rate or got interrupted.