Oh hey I spent a good chunk of my day beating five islands...oh hey it's not giving me my hard badge...oh hey there's no way to prove that I've beat five... ._.
Unless the skill tree is random, you end up with ten extra intelligence and missing 40 agility, 40 dexterity and 10 charisma. That was a bit disappointing. Still, an incredible game and definitely deserving of a 5/5.
+3 for sequel to an awesome game
+3 for hilarious upgrades
+1 for "Premium Content"
-1 for the bits of lag I experienced (and not just the lag needed for the medal)
-1 for the screamer, which was neither expected nor appreciated
So you still get a 5/5 for an awesome game.
The score thing seems silly considering you have to do each level before starting the next one. High score could be simplified to reflect levels beaten over stars earned.