I actually had this app sitting in my 'Other' folder and decided try Kingdom Island on it, and to my amazement it worked! The app is called Mercury Browser and yes...IT'S FREE. There is also a $0.99 version but I don't think there's a loss in that. But not only can you play Kingdom Island on your iOS device, it's actually a very nice browsing app. You can have themes and all kinds of stuff. But overall this is for the people who are: too lazy to go on their computer or don't have a HTML5 browser (e.g. Internet Explorer). Anyways here is the the link to download the free version on the App Store if you coincidentally were using your iOS device:
https://itunes.apple.com/us/app/mercury-browser-fast-web-browser/id331012646?mt=8
Edit: By the way I was using my iPad 3rd Generation, since the screen is smaller on the iPod and iPhone it may be a bit harder to play. But the music works