Currently in the overworld HUD there is a trophy (representing gold, silver or bronze) and then a number (representing the amount of that trophy that you have). I was thinking of using a different method.
Instead of trophies you would have three coins, one bronze, one silver and one gold.
That's what the coins look like. If you adopt this idea you will may wish to edit the coins.
Next, the amount of that trophy/coin would be on top of the coin, like this:
There's my idea. Now, what do you think?