Works okay, maybe a bit slow lack some sort of spice idk. Maybe make the movement more snappy or smth where they go very fast and then slow down.
The knights are really funny to play with, even if they move in a really not Knight way. I'm weirded out that pawns can take whats in front of them but I guess there's no other way. I feel like that's a lot of controls (just to navigate + 2 buttons to change direction + 2 buttons to slightly adjust the pieces, i dont think we really need the adjustement buttons). Maybe the direction the piece goes in depends of the camera, that would make it more golf-like? Because currently the game doesn't really justify the fact that it's 3D, besides maybe the Knight (I had a funny bug where it jumped and it stayed on top of my piece without killing it).
I think you should remove the ring that's around the board, make pieces be able to fall out of the board. Maybe favor knocking a piece out of the board as a way of killing them (that would make better use of your physics system?) than just having to touch it. Heck maybe add a hole in the middle of the board lol.