I did not expect this concept to be that fun, well done ! Very simple mix of mechanics, but from which emerge a lot of depth ! I played it for a lot longer than I expected ^^
I think a little more feedback on the metal gauge would be neat, it took me some time and a re-read of the description to understand properly how it works. It is not obvious at first that it is detrimental to end a combo on a wrong element. Other than that, great job !