The virtual lemmings march mindlessly through dozens of 2D levels, each of which is filled with a series of obstacles and traps (perhaps placed there by some deranged person with WAY too much time on his hands). Each level has specifies how many lemmings, total, will march through the level, as well as the minimum number of lemmings you must rescue to complete the level. To enable you to guide as many lemmings as possible to the goal/exit, each level provides you with different amounts of abilities and tools you can provide at any time during the level to whichever lemmings you choose, such as digging, climbing, building bridges, and blocking other lemmings from passing. You can apply the abilities to a lemming simply by placing the cursor over him and clicking.