You need some additional help with the lost woods. Well, I might be able to help. I'm not giving out any solutions, however I will help with the logic required.
You get these pieces of a puzzle, and you have no idea what to do with them? Start out by selecting the first piece.
Well, in the first screen, going south takes you out of the woods, and you can't go north. Either of those facts can be used to rule out two of the choices.
Now for the next part, you need to decide between those two remaining. So look at the way you would exit the woods on the fourth move. Now it's narrowed down to a single choice.
Follow the rest of the choice, and then you need to figure out the second piece the same way. Then the third, and then only one remains.
When you get to a house, go inside. There's a button you can press to open a shortcut between the house and the dungeon entrance.
One thing about the third section, there is one screen where it narrows it down to two choices, but when you get to the screen, you'll see one of them is impossible with the screen design.
That's the kind of logic that is used throughout dungeon.
Write the solutions down. You'll need all three of them for the, ahem, final path. Cue the cries of despair.
Well next is a bit different, but you have what you need from the first parts. It's still the same woods, and you can figure it out with or without a map of maze paths.
You have to start the same, and you have to end the same. So assemble whatever clues you need to form the start, and continue through the path until you can't. That would be where the path changes. Then do the same thing from the end going backwards. Then you'll be left with half of the clues remaining to solve. The middle part has to be the same as one of the earlier solutions also, and with only half the clue remaining it's possible to solve.
Let's Play - Secret 4 (youtube). Part 30 of the Let's Play is solving every part of Secret 4. It took about 50 minutes to get through.