What is the ruling on paying real money in exchange for imaginary currency in the game "Subway Surfers," and is that considered a sale?

It is permissible to pay money for new tools or to upgrade a game, provided that the game is Islamically permissible. However, it is better for a Muslim to preserve their money and time and not waste them on what brings no worldly or otherworldly benefit. For a Muslim will be questioned about their money, time, and youth on the Day of Judgment, and they should seize the opportunity of their free time and youth.