For kids (likely the target audience of this), the $99 developer program fee would be quite high (let alone the fact they have to register under a parent's name) -- I don't think this will really make an impact on the App Store.
Interesting. I would assume that the Mac+dev-program+testing-device combo would convince people to either go for a full-fledged port or not go through with the idea. (Do note that iOS users aren't accustomed to anything non-native, even just an alternative-styled button can throw them off, although this is less of a restriction in games.)
