[Mojo]

Hi and welcome to the forums!

1: The reason you can't get to Zulag 2 is because you're not
supposed. You'll find out why later in the game.

2: There are secret areas scattered throughout the game. In the
first level, search behind barrels that hide the floor (for
example, on the first or second screen, there's a barrel sticking
out of the floor, you can get down there by pressing 'down'.
There is also one in the part with al the bombs in the gaps.).
Also, there are a few sneaky secrets too. In some of the holes
you have to open, (By a lever or a ring, hint, hint), there's a
secret areas too. Just open em, and run into them.

3: You can either climb up the ledge where you can see debris
falling down, or you can turn on the well with the switch. (The
switch has a rather 'unpleasant' surprise...)

Hope this helps! Good Luck!