It's not good to stumble on addicting Flash games early in the morning as a an entire day of work could be blown playing. Fantastic Contraption falls into that category.
This game reminds me of a high school physics project we had to build that moved an egg a certain distance into a container without breaking it. In Fantastic Contraption, you build a device to move a wheel into the goal. Sounds easy, but the levels get harder and the time spent longer. Clear your calendar of appointments and have fun. [Via Kottke.org]