Thank you for taking the time to give feedback. I think some of the problems you were having with collisions were caused my my inexperience in transferring Blender models to Unity. I have thought of a better way of handling collisions but ran out of time. (this is a jam game)
I abandoned the grid system for unrestricted placement because I decided it would be easier to make a game where speed is more important than precision. But I am going to try again and make 3d tetris style game and I will remember your tips when I do this.
I'm glad you liked the mouse panning. I have changed the way this works in gameplay. But when you pause or lose the game you will be able to look around. I didn't add any new scenery though.
Thanks again!