I absolutely love it when potential hires have developed games in their spare time.
Firstly it shows that they program outside of work which suggests they really love programming and aren't just clock punchers.
Secondly it shows that they are the kind of person who can complete a non trivial project purely through intrinsic motivation.
Finally games can be pretty technically challenging so if you can make something half decent you probably know what you are doing.
Any company that looks down on you for writing games is probably not going to be a fun place to work.
