There is a plenty of competitions out there and I am participating on one on Arabic forum but the game will be in English ofcourse :)
Today I found a new competition on GameJolt not made by GameJolt team but by the owner of GroundZero Website the competition theme is Making a Really Hard Game.
Although it must be hard it must also be beatable :)
The problem in that competition is I know it right now which only leave for any one 3 days before the deadline (6th July).
I don't think I will participate in it as I am busy this period so If anyone intersted this is the complete information about the competition (link).
Hope to see really nice games there :)