What's the use of old coins in "Heavy Soldier 3"?

This is an interesting prop inherited by 1 generation, coins, used for divination (gambling? ), throw the coin into the air, and then guess whether the coin is a word or a picture after it falls? Use this method to decide what to do next. ...

As for the characters in the game, they just can't. Such as konjac and other props that can be seen everywhere have no effect. The reloading machine soldier is such a game.