Are there items (such as additional content, offers or currency) for sale that are used in the gameplay of your product?

Yes, in-game coins exists, which players can use to make purchases.

Are in-app purchases refundable?

No refunds available.

What payment platform is used to facilitate these purchases? Do you use Epic Games’ platform or a 3rd-party (including your own) payment system?

We only provide Epic Games’ platform payment system.

Can your product be used without making any in-app purchases?

The product can be used normally without any in-app purchases. You can obtain the product normally by playing the game.