I’m trying to pay for my game can you pay it now

You may need to have a payment method on file, even if the app you want to download is free.

See -> Check which payment method you have on file 

See also -> Payment methods you can use with your Apple ID

Payment methods you can use with your Apple ID – Apple Support (UK)

You can also use your Apple ID balance as payment method: Add money to your Apple ID balance

Add money to your Apple ID balance – Apple Support (UK)

What you can buy with your Apple Gift Card or Apple ID balance

What you can buy with your Apple Gift Card or Apple Account balance – Apple Support (UK)

How to redeem your Apple Gift Card or App Store & iTunes gift card

How to redeem your Apple Gift Card or App Store & iTunes Gift Card – Apple Support (UK)

If you mean Apple Cash, see -> Set up Apple Cash

Set up Apple Cash - Apple Support

Make purchases using Apple Pay.