How to install a non-compatible iPhone app on iTouch?

I downloaded an app which only works on the iPhone (and iPad) and not the iTouch. Is it possible to somehow change it so that it can install on the iTouch? I really want to play it (it's a game) but there's no way I'm gonna go out and buy one of those just so I can play it.

The only way for a device-specific app to work on your Itouch would be you would have to jailbreak it

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