At the core of the game is a brilliant original idea. You apply one of eight abilities to the lemmings, which all have obvious uses but can also follow on and interrupt each other to offer new possibilities. These can be simple and natural – transitioning a digger into a floater – or fiendish tests of multitasking and timing. Try catching a digger as a floater, turning him into a blocker, catching the lemmings behind him as floaters, then grabbing one to build a bridge up as a landing pad before you run out of brollies. Later levels ask for enormous precision, making you land lemmings on tiny pillars, bounce bridges around the landscape, and carve mercilessly through the terrain.