What a joke!
On top of their very bad communication and challenge management, Google has a curious opinion on what will change and improve the world.
There were different categories and it seems that only one has been retained (social, education).
They have even not published a simple list of submitted project by categories.
By the end of the submission period, they have blocked access to the original pages and now they have flushed their cache.
Challenge categories:
Community: How can we help connect people, build communities and protect unique cultures?
Opportunity: How can we help people better provide for themselves and their families?
Energy: How can we help move the world toward saf...

What a joke!
On top of their very bad communication and challenge management, Google has a curious opinion on what will change and improve the world.
There were different categories and it seems that only one has been retained (social, education).
They have even not published a simple list of submitted project by categories.
By the end of the submission period, they have blocked access to the original pages and now they have flushed their cache.
Challenge categories:
Community: How can we help connect people, build communities and protect unique cultures?
Opportunity: How can we help people better provide for themselves and their families?
Energy: How can we help move the world toward safe, clean, inexpensive energy?
Environment: How can we help promote a cleaner and more sustainable global ecosystem?
Health: How can we help individuals lead longer, healthier lives?
Education: How can we help more people get more access to better education?
Shelter: How can we help ensure that everyone has a safe place to live?
Everything else: Sometimes the best ideas don't fit into any category at all.
I'm now convinced that this game was setup by Google to grab or better to harvest ideas for free and take patents to make business.
I invite everyone to monitor the patents issuing rate from Google since a few months and in the near future.
As an example, I've submitted the Energy meter at the beginning of the game and 4 months later the Google Power meter was published with exactly the same features.
Very sad.