Player Move-Rotation

Hi, i'm working with Unity since i learnt it at my College (Game Design) and ireally want to do a game like Angry Bots (but i dont know JavaScript) and y try to convert js to c# but i cant, anybody knows how to make the player follows the mouse cursor. My problem is that the game is a top down, and the axis of the mouse cursor is X and Y...but i want to see above X and Z and do not have Up or Down...anybody knows it in c#?

Thanks