Hello smar8en,
Thanks for reaching out to Apple Support Communities. Upon review of your post, it seems that you are having some issues with a part of your touchscreen that doesn’t respond. We can see why you’d want this taken care of, so let us help from here! Let’s start by reviewing the following article which may help: If the screen isn't working on your iPhone or iPad. If this issue is only occurring with that specific game, we’d also advise making sure the app is updated or possibly uninstall/reinstall it.
Please let us know if you have follow up questions, so we can continue assisting. Take care!