online game with Gamelab, published 2001 by LEGO.com

Gamelab made many games with LEGO and Junkbot is one of my favorites. Junkbot is a robot janitor, but the player doesn't control him directly - instead, you play with LEGO bricks, moving them around to create stairways and bridges for Junkbot to cross. The intuitive interaction, open-ended problem-solving, and catchy soundtrack by Michael Sweet made this one of the most popular games on LEGO.com for years.

A sequel, Junkbot Undercover, was launched in 2002.