I also prefer 2D as I'm still learning lots of new things. I'll check out construct2 when I get home. Unity can also do really good 2D.
My last gamejam game was in Unity, but I wasn't the coder, I was the artist becuase I'm not the best with C#. Superpowers intrigues me becuase it's an HTML5 game egine.
http://superpowers-html5.com/index.en.html