The crabmech design is solid and great IK! The scan lines on the ammo counter are also a nice touch. IDK this is intentional or not (seems not by lack of any vfx) but I was able to "fly" by pressing jump again while airborne. Given the size of the level it'd also be nice to travel faster--which I did by flying. As others have said the camera does get a little funky in corners/close to the wall.
I liked the free aim/lock-on options, but it'd be nice QoL improvement if the free aim had a UI reticle of some kind, and I could toggle the lock-on by pressing shift instead of holding it while close to an enemy.