Angry Birds HD app won't download
I am using an iPad mini with Retina display. A few hours ago, I purchased the Angry Birds HD app from the App Store, because I enjoyed the free version and wanted to buy the full version, but the app is refusing to download. The message I get is: "Unable to download app. "Angry Birds HD" could not be downloaded at this time."
Trust me, NOTHING is working. I have tried the following after reading this website:
-Turning the iPad off, then turning it on again.
-Restarting the iPad by using the sleep and home buttons.
-Signing out of my Apple account, and signing in again.
-Turning off Wi-Fi and then turning it on again.
-Turning Airplane Mode on and off.
-Tapping the app rapidly.
-Setting the date forwards a year after turning off the Automatic Date and Time feature, the setting it back to normal.
-Deleting the app from the home screen and adding it back.
-Plugging the iPad into my computer.
-Downloading a free app.
None of these work. I'm completely lost. It just will not download, end of story, and I have no idea why. If anyone can help me, I'll be really thankful.
iPad