Every month Experimental Gameplay posts a new theme. The goal for participants is to create a game using this theme sometime during the month while spending less than one week on the game. This challenge was born out of a project by a group of students at Carnegie Mellon to each create a new game every week. I used to follow the blog during the original project in order to play the games they produced, including a really fun one called Tower of Goo, which Kyle Gabler later expanded on in the slightly better known, World of Goo.
The theme for Experimental Gameplay in August and September of 2012 was Time Manipulation. Unfortunately I did not get a proper game finished, however I did make a basic puzzle game based on a more technical interpretation of the theme.