Through 2, seems to have broken enemy groups and seems to play on a "power curve" for enemies like New Quest, going to hurt on NES authenticity points..
Edit: Through 3, thank god for potions early. Blue Wizzrobes with 6 Hearts are NASTY, NASTY, NASTY!
Edit: Got keylocked thanks to the Boomerang order, had to break into 5 to get a key. Maybe you should put the Boss Key at the Boomerang area.
Edit: Bugs in 5. I can't get the StepLadder. There seems to be a marking where I need the Whistle, and the wall by the arrow has no way of getting in. I'm stuck, I can't get either the Ladder or the Whistle.
-James