1000 years after apocalipsis on earth, many forms of life were extinct, including humans. As aliens discovered earth, they built a robot series, called Minilens, to clean up earth and collect surviving flora for cultivation. The game is won when all radioactive barrels are destroyed and all flora is collected. The alien builders of the Minilens forgot that earth has gravity, therefore Minilens can't jump. You have 7 level packs, including a Tutorial.