Super Mario Run breaks the App Store; service is down for some users6
Apparently, this message is appearing from coast-to-coast indicating a nationwide problem with the App Store. Even though demand for Super Mario Run appears to be behind the sluggish App Store performance, other unrelated apps are also affected. For example, all six apps listed in the featured section of the App Store lead to an error message when you try to open one of them.
Hopefully the problem with the App Store is resolved soon so that those interested in the game are able to play. The first three levels are free, as well as 20 seconds of the fourth level. After that, you will need to pay $9.99 in order to play the game.
If you haven't been able to install the game because of issues with the App Store, keep trying. And if you don't know where to find Super Mario Run, simply click on the sourcelink.
source: SuperMarioRun via AppleInsider