Good - simply not AS good.
The original "Games" were practically perfect, simple and ingenious. The third entry is good, simply not AS good. A lot of people have whined about the difficulty; but that's not really what irks me (Though that Bieber/Edward puzzle on the Boss' stage was annoying.) it's the humour.
I still laughed a fair amount in this one; but it felt like you were running out of ideas. You did all the memes/viral videos this series needed in "Hamlet" and "Epicroll" in Replaying :the game:. Memes can be funny if pulled off right, but this overdid it at times - I often got annoyed seeing troll and rage faces in place of your usual, much more cunning wit.
Thankfully there will still plenty of genuinely funny ones that kept the viral vids/memes to a lower level, and you did at least pull off some good pop culture references. My favourite game though had to B.P.: The Game. That was BRILLIANT. I about fell out of my chair watching a poor pelican being aggressively swabbed against a pool of oil and then burned to launch a madman in a top hat into the sky. Wikileaks was a top contender, as was the Teenage age group demographic one.
You also deserve credit for changing the gameplay up; by this point it would have been unwise to just vary the "Walk off of grassy platform" gag (Though I think you could milk maybe 2 or 3 good jokes out of it.) so the platforming thing worked out. The biggest problem I have with it though are some of the physical elements. Probably the worst examples being in Bisexual Musicians, Tea Party, and Obama/Wikileaks guy's puzzle in the Boss' level. To elaborate; stacking characters on top of characters was nigh impossible. I think maybe faithfully recreating the characters odd angles in the hitboxes was a bad idea; having rounded out edges would've made those parts less glitchy and genuinely annoying. Otherwise I didn't mind the difficulty; I felt it was part of the joke.
I had to flip a coin whether to give this an 8 or a 7, since I want to say "7.5" but we don't have a decimal system (Hey, whatever happened to the old NG formula of ratings based on scoring individual sections? That was a great system.) so it was a toughie; but I'm giving you an 8, since it landed on heads... then because I replayed "BP the game" and couldn't resist giving you an 8 for it alone.