Feather Tether is one of the games produced by participants at the UMBC Global Game Jam site.
“Two birds race to the moon and while a tether holds them together. These conflicting buddies must stay together and protect the tether by all means, yet compete to win. To achieve the ultimate goal both players should cooperate to survive their adventure to the moon.”
This was the top-ranked game that came out of the UMBC site based on the votes of the participants.
It’s a five minute flash game that you can download it and play on almost any platform. As an added bonus if you do download it, you’ll get the source! After playing the game, you can rate it on the Global Game Jam site.