A new toolset package named StencylWorks came out not long ago, allowing you to easily create games that run on Adobe's Flash platform. Apparently you can also make games for iOS with it. It was created by some MIT guys, and a few fellow game devs have told me good things about it, so I thought I'd share!
Clicky: http://www.stencyl.com/stencylworks/overview/
I'm not a huge fan of the Flash runtime and I have not tried this software personally, but I hear it's a good choice for the beginner. Flash also has plenty of advantages. All in all, if you've never had any game dev experience before, this could be a good place for you to start. :3
[video=youtube;SNhdHTof4to]http://www.youtube.com/watch?v=SNhdHTof4to[/video]