all games are not created equal

At some points, L4D becomes a clicking game, where all you're trying to do is click really fast in order to kill all the zombies coming at you with your handguns.  Super Collapse is also a clicking game at the very end when you're just trying to clear all the blocks possible before they pile up too high.  L4D wins though because when you click a bunch, zombies die.  In Super Collapse, the only thing that happens when you click is boxes go away.  Yippie.