I need to make a collectible coin and have a tracker for it

Im making a game where a character has to collect all the coins, and then advance to the next level. But I do not know how to make a collectible coin or a coin tracker. Any help would be greatly appreciated. I have tried looking at tutourials and other resources but none have been of any help.

What about this Awesome Tutorial Series ? I mean there is a collectible coins and there is a tracker for it.

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