I just wanna say I love the animations! They're very fluid and look fantastic, kudos to the artist that made them.
How does the dial feel, is it intuitive?
I think the dial looks great. It's very clear what you are and aren't able to drop. Shift to bring it up is a good control. I did find myself wanting to click on the dial to drop the body part rather than E.
* How does the arm throw feels? (Trajectory, Gravity, Distance, Strength)
It took me a little bit to figure out how to throw the arm. But once I did I thought it felt pretty good. I think the throw could use a little boost to the strength but otherwise it felt great.
* What do you think of the scenery?
I think there is a disconnect between the background and the actual level. I feel like the character and concrete like level blocks worked well together. I think that a more urban or lab-like background would work better with the concrete stylings of the level. I don't know how this will look but you might want to have the water end at the edge of the block its over, though that may not be a good look. I'm not sure if you would be able to get this working but a water animation would be very nice!