Have you ever watched a toddler take those first few halting, tottering steps before faceplanting into the carpet and thought 'Ha ha, what a doofus! Walking is easy. You are so dumb, baby'. Well now the joke's on you, you insensitive prick. Imagine having a bottom for each major muscle in your legs and having to press them with the correct timing to walk. Now imagine that instead of just walking, you're having to run a 100 meter dash with a long jump at the end at the Olympics. Well, you just imagined QWOP.
QWOP is more toy than game, but so was SimCity, and that did well. You will inevitably break your avatard's neck 20 or 30 times before you figure out how to even take that first step. Then you will do so 100 more times before figuring out how to make that first 10 meters.