Saw the author of Replica Island talk at Google IO. He's worked for nintendo among other handheld companies and really knows his stuff. He works for Google now and developed Replica Island as his 20% project. I'm glad that his software runs well on all the various android capable devices because if he can't get it portable, chances are not many can. One thing not mentioned in this particular article is the fact that he's not only open sourcing replica island but also the engine he's developed to create it, so it should make game development easier on the rest of us.