Hi Pivoriver,
I do not use Unity myself, however, you have a couple of different approaches to deal with this:
- Ideally, you want to tell the engine to run the frames of the shadow animation aligned with the character at all times. Run the shadow animation in the same spot the character is at all times (I'm sure many YouTube tutorials explain how to do it way better than I)
- Alternatively, you can use an image editor (such as Aseprite or Photoshop) to combine both layers before putting them into Unity, this way, you won't need to handle several layers in the engine (however, this is just a temporary patch because for developing more complex game situations, you gonna need to learn to deal with different layers in the engine)