iMessage Game not working and not allowing me to downoad game pigheon

Hi Bitto0,

For help with redownloading Message apps, check to see if the app is already listed, delete and try downloading again. The steps below found in the article here will assist: Use iMessage apps in Messages on iPhone - Apple Support

"Manage iMessage apps

1. In a Messages conversation, swipe right on the app icons below the text field, then tap 
2. Tap Edit, then do any of the following with your iMessage apps:

• Reorder apps: Drag .
• Add an app to your Favorites: Tap .
• Remove an app from your Favorites: Tap .
• Hide an app: Turn the app off.
• Delete an app: Swipe left on the app, then tap Remove from Favorites. Swipe left on the app again, then tap Delete."

If the issue continues check out the steps here: If you can’t download or update apps on your iPhone or iPad

You can also provide more information about any alerts you're seeing when you attempt to redownload the app, or if the issue continues when connected to a different Wi-Fi network.

Cheers.