I'm a sound designer who just needs to build a portfolio and get some real world experience, I've never designed sounds for a game before but it comes pretty naturally to me I think. Or you be the judge of that!

http://opengameart.org/users/fourier

or

https://soundcloud.com/third-octave/navigation-sound-i

https://soundcloud.com/third-octave/button-press-1

https://soundcloud.com/third-octave/are-you-sure

https://soundcloud.com/third-octave/are-you-sure-ii