Why not, writing games is fun. I wrote a little Tetris game myself when I was your age.
Download Visual Studio Express 2013 for Windows Desktop and play with it. Make a Windows Forms app or a console app in either C# or VB.Net. There are tutorials and samples. IN general, VB is a little friendlier, but C# is the one you really want on the resume.
http
/www.visualstudio.com/downloads/download-visual-studio-vs#d-express-windows-desktop
Or you could learn to write apps for the iPad. This however requires a Mac and an iPad, not just a PC.
https

/developer.apple.com/ipad/sdk/
There's also Java, still very popular. (Java+SQL) or (C#+SQL) are both good combinations to have on your resume.
Or you could learn C, if you're interested in writing very fast and efficient code, e.g. for device drivers. Mind you, this is a tough job.