Experimental Gameplay Project - a game every 7 days

Experimental Gameplay Project is an university site showcasing new games as they become available, usually on a weekly basis from a set of students.

The rules are:

• each game must be made in less than 7 days
• each game must be made by one person, including all art, sound, and programming
• each game must be based around a certain "toy" ie. "gravity", "vegetation", "swarm", etc.

Related to this is this site about how they developed their games so quick!