I find it a little perplexing that this app should be $2.99, when there is a FREE version on the Marketplace that does exactly the same thing (although obviously for FREE).
Plus another nail to the scrotum of this app (and the free one too) is that it is just basically a shortcut based program. You want a game, here's the link to download the open source EMULATOR application first.
So you end up with a separate Emulator app for each type of game cluttering up your phone.
None of which were written by the guy who made this app. Basically he is leeching off the hard work of others, and asking you folks to pay him for the privilege.