It seems that today it's the freebie day (well... for some of us). Because today the next Windows Vista Ultimate Extra is available: Tinker.

Tinker - to shorten up things - is a Sokoban interpretation with some interesting twists.

"Being a small robot isn't always easy. Being a small robot marooned in a surreal world of clockwork, obscure mechanisms and infuriating puzzles, even less so. In Tinker, a puzzle game that pushes the boundaries of robot frustration, you'll guide your robot through switches, lasers, teleporters, and a host of other contraptions to reach the exit. He'll only do what you command. He'll only go where you tell him to. Will you lead him home, or will you doom him to eternal confusion?

Featuring captivating visuals, an original music score, and 60 levels that range from the facile to the infuriating, Tinker is an isometric, two-dimensional puzzler published exclusively as an Ultimate Extra for Windows Vista Ultimate Users. Tinker features tutorial level, and will include regularly released level packs to expand the experience. Want even more? Download the level builder, and create masterworks of ingenuity to keep your friends scratching their heads. What are you waiting for? Start Tinkering."

It's good looking, fun, the music is great and it's free...

And it's got it's own Level Editor:

Source: http://www.fuelgames.com/