Cool concept with the elements. I like that it gives different permutations of puzzle.
I would just work a bit on the playability. It would be great if I moved with the platform (I think that is easy to implement in Unity). Some kind of indication of what element I was wielding would be nice. The biggest thing that would have helped the gameplay is some kind of indication of where the element would land and take effect. Like, if I held down Q it could show the arc that it would take and where it would take effect. Just an idea.