News taken from AtariAge.com:

Atari 2600 programmer Thomas Jentzsch has released the full version of his puzzle game Jammed for people to download and enjoy. Your objective in Jammed is to steal the car of your dreams from a crowded parking lot, but you must first move all the cars that stand in your way! The full version of Jammed contains 600 unique puzzles, versus the previously available demo that only allowed you to play 30 puzzles.

http://www.atariage.com/software_page.html?SystemID=2600&SoftwareLabelID=1626