It's also strange that out of the four forces in the universe (gravity, electromagnetism, and weak/strong chemical bonds [the last two may have a different name, but I'm pretty sure it's still the same thing]), only gravity is an element. And their might be more forces in the universe... those are the only ones I've ever heard of though.
There are four fundamental forces in the universe:
Electromagnetism - This is what attracts negatively charged particles to positively charged ones. It produces magnetism, electricity, light, radio and other waves, and the chemical bonds that form molecules. If it's bigger than an atomic nucleus and isn't caused by gravity, it's caused by electromagnetism.
Gravity - This is the force that attracts matter to other matter. It's weaker than electromagnetism, but can be felt at extremely long distances. No one really knows for sure how it works, though we have a lot of crazy ideas involving gravitons, acceleration, and the curvature of spacetime.
Strong Force - This force attracts differently colored quarks together to form protons, and attracts protons and neutrons together to form the nuclei of atoms. It is the strongest of the four forces, but the range does not extend past the nucleus.
Weak Force - This one involves a lot of weird things happening to subatomic particles, mainly the decay of neutrons into protons and electrons. (which are emitted as radiation) Like the strong force, it can't be felt at distances larger than an atomic nucleus.
Both the Weak and Electromagnetic forces have been shown to be manifestations of a single Electroweak force, just as electricity and magnetism were found to be different aspects of electromagnetism. Most physicists therefore believe that all four forces are actually the same force, and discovering this "Theory of Everything" is one of the main goals of current theoretical physics.
Matching these forces to the "elements" in the game would be tricky. Gravity is obvious, and the Weak force's role in decay might fit entropy, but what about electromagnetism? Light would make the most sense, but as others have mentioned, natural magnets occur in the earth. Lightning is found in the air. Water is a molecule held together by electrical forces. It fits nearly everything. As for the Strong force, we don't have any element that involves binding things together.
I think it's best not to try and bring physics into this; that way madness lies.