For a first 3D game this is a good start! I enjoyed the idea a lot, and I think with some more experimentation and practice, you could do something cool with this game.
- (+) Magnetism is always a nice mechanic, and I like what you were doing with the swapping between pushing and pulling.
- (-) Controls are very difficult. The mouse sensitivity is very high, and the movement speed very slow. I also wish you displayed the current mode somewhere on the screen, as it wasn’t so clear with the colors which one you were in, especially after leaving the menu.
Good job on your first 3D game!