I am new to all this so probably not good enough for these advanced games. However, I am very keen to learn and see what and how others do things.
There is an "editing competition game" on at the moment:
https://www.facebook.com/TenCollectionSouthAfrica/app_494845897298657
I don't know if you can access this link from anywhere in the world. I see it lists the country.
Try this link, maybe it works better:
http://www.tenbyfotolia.com/#!/za/13/
In any case, it is run by a German (?) stock site and is called TEN.
You can enter different categories. Whichever you choose, you get to download 30 images. You have to use at least 3 of them in your submission, you may add your own pictures into the edit and you can do a lot of graphic design if you can do that (which I can't :-)).
Perhaps this would be a fun project to actually do here and crit and help each other with edits. Then each author can still decide whether they want to enter it into the competition or not.
It closes at the beginning of Feb some time (I think 10th, can't remember any more)
Regards and Happy New Year
Gaby