Runnercraft is no longer on the App Store but you can grab the IPA here and push it to your device.
Use an IPA installer (such as Cydia Impactor) to push it to your device.
I've had some luck with Cydia Impactor on a non-jailbroken iPad.
Come experience a Minecraft runner like never before! Navigate perilous obstacles while collecting materials to craft items and power-ups to help you along the way.
There's cows. And chickens. Forever.
-Deadly cow stampedes!
-Gorgeous, Minecraft inspired environment!
-Fully functioning crafting system with recipes!
-Pickup unique materials!
-Create your own power-ups!
-Random seeds to explore a billion worlds!