Why are certain games only available on iPad? I recently bought a 5th generation iPod touch. I searched for "Magic 2014" but was greeted with the message:

"Magic 2014 is only available on Apple iPad".

Why are certain games iPad only?
The most simple answer probably is because the developer decided accordingly. There might be several more specific reasons, the most relevant is probably that some games just need a bigger screen and/or it's too cumbersome to maintain two GUI versions in parallel.