A follow up to Peggle, possibly the most addictive puzzle game of all time save for (maybe) Tetris, PopCaps' new Peggle Nights does almost nothing to the deceptively simple and thoroughly winning formula of its antecedent -- which is as it should be, because Peggle wasn't broke, as the saying goes.

Like its predecessor, Peggle Nights is a deceptively simple puzzle game that has you launching a ball from a pivoting cannon atop the screen, trying to take out as many color-coded pegs, bricks and other obstacles as it falls ever downward, but ricocheting like crazy along the way.

There's a certain childlike wondrousness to the ping-clang-boink-boink-boink of it all while the serious addictiveness lies in trying to clear a screen by not striking the required orange pegs until the very last -- but before you run out of balls. So you're aiming just so, trying to string long shots and multi-bounces together, striking bonus pegs maybe and landing a dunk in roving free-ball basket at the bottom, ultimately culminating in a rousing chorus of Ode to Joy.

There are some 60 levels for Peggle Nights, all of them new, all sporting nighttime settings - basically dusky-palette backgrounds and an inconsequential premise of nocturnal "dreamtime" adventure with different "Guides" that each offer a unique, temporary assists in the form of a shot special, free ball, smartbomb or whathaveyou.

It may sound "casual," but Peggle Nights is practically narcotic in its addictiveness, and that's leaning more toward the "serious" side of the game spectrum.