Ladder:Makes a ladder/stop making a ladder
Stone:Become a stone
When you click on a lemming, he does a selected command.
When 30 lemmings escape, the level is a success. Use a nuke command
to finish the level if "enough" is indicated on the screen.
When a lemming steps on a thorn or he is killed by an enemy, leaves
decrease. When leaves become 0, the level is failure.
When a lemming picks up an apple, he turns red. A red lemming can