Pretty nice. I had a similar idea a while ago but not using "spheres", and this works well, well done.

UI wise, the lines crossing each other when you select a sphere is not very elegant. WHy dont you make the news you select appear on the left, while keeping the suggested news on the right ? That would look so much better, and be less confusing for the user.

And the tutorial was a bit too long. I would rather have in-line help than a mandatory tutorial.

one more thing, there is little to no value of providing a pre-visualisation of the web page. It would be so much more useful to provide the first few lines of the articles. There are libraries to scrap articles that do that very well.