Best On-line Puzzle of the Year! (So far)

http://www.continuitygame.com/
Ragtime Games consists of Elias Holmlid, Dmitri Kurteanu, Guy Lima Jr., and Stefan Mikaelsson. They reside in Gothenburg, Sweden and study at Chalmers University of Technology and Gothenburg University.

Let's talk money now. You can play all 32 levels for free! (Level 29 is so much fun!) And it will engage your mind for a good 2 hours, which is, coincidentally, about the length of a movie. So do consider making a donation on their behalf: first, as a token of appreciation; second, in the hopes that they will make more levels. (Imagine if all movies were free and you paid at the end whatever you wished!)