Help me find this game, please

There was a free game I played a few times on the web somewhere, and now I can't recall what it's called - so can't find it again. It's a puzzle game where the objective is to move this block into the 'end' zone. To do that, you had to create a contraption made out of solid bars, semi-permiable bars, and two types of wheels/gears (one ran clockwise, the other counter-clockwise).If anyone knows what this game is called or where I can find it, I'd appreciate the assist. Thanks all.

blackheads scars