Trick:
  
This game includes a little hidden bonus game:
  
When youre at the Horrorland Plaza, then check all the trashcans until you find a hammer. When you return to the Werewolf Village, then go to the wheels, who can shut off the fire. Use the hammer on the "Worm", and then you get the option to play the bonus game.
 
Escape from Horrorland Walkthrough
 
This lists steps necessary to rescue everybody and get out of the park.  It
does not explore every nook and cranny, nor does it collect all the coins,
most of which are in the underground tunnels, require dealing with the
monsters there, and are apparently otherwise unnecessary.
After the opening video, you are in Werewolf Village.
Go into the cafe and catch a roach, put in pouch.  Exit cafe.
Proceed past fire station, down path, to Horrorland Plaza (movie theater).
Go into Museum.  Take mop, put in guillotine, chop off mop head. Take mop
handle, put in Vampire Eyeware display, take both pairs of sunglasses, put in
pouch. Proceed to twin statues with red eye rays.  Put one pair sunglasses on
each statue. Take scarab between statues, put in pouch.  Exit museum.
Go back to Werewolf Village.  To put out fire, go to control wheels behind
fire station, click in quick succession left wheel, right wheel, middle wheel.
Proceed to middle of Werewolf Village plaza.  Go into the butcher shop.  Open
freezer door on left to free Lizzy.
Werewolf attacks.  Chase ensues.  When Lizzy says "Run to me", click upward
mouse hand, "Over here" means to the right, "This way" means to the left.
After Werewolf is trapped upside down, move mouse hand around either side of
screen to bottom of screen, grab dangling Mummy Hand, put in pouch.  Click on
waiting Lizzy to go back to Horrorland Plaza.  Lizzy captured again.
Proceed to Bat Barn.  Click on pumpkins on right so they say "The scarecrow
walks at midnight".   Bat Barn door opens.  Go into Bat Barn.  Take roach from
pouch, click on flying bats, they will go away and exit door to Bar Barn will
appear.  Return roach to pouch and proceed on out of Bat Barn.
Go to Valley of the Lost Kings.  Proceed to pyramid entrance.  Click on
handprint in stone on left.  Take hand+scarab from pouch, click on handprint
with it, then return hand to pouch.  Go to pyramid door, which will open.
Proceed into pyramid.
Adjust stone wheels on left/right columns as necessary.  (1 click, left wheel
2; 4 clicks left wheel 3; 2 clicks right wheel 1; 3 clicks right wheel 2; 5
clicks right wheel 4).
Proceed into Sand Room.  Move symbols on 4 columns so each column, top to
bottom, has fire (red) symbol, eye, blank eye, and "equals sign".  Then click
on Indiana Jones hat, which will capture whip in pouch and open door to Mummy
room.
Turn around, open mummy case containing crow bar, take crow bar, use on first
mummy case, and out pops Luke.  Follow Luke out opening into tunnel.  After
dog drops bone, turn around and run through tunnel to avoid following mummy.
(Cursor keys may be better than mouse for making sharp turns.)  Eventually,
Mummy gives up and you are deposited in Mummy-fighting room.
To kill Mummy, take torch from wall, click on mummy repeatedly.  If torch goes
out, relight by turning around and clicking on fireplace, then turn back to
continue attacking mummy.  After a minute or so of this, mummy will die.
Click on dead mummy's hand to get ruby ring, put in pouch.  Proceed through
stone door back to pyramid entrance hall.  Exit pyramid.  Proceed through
covered bridge back to far side of Bat Barn.
Turn and head for Vampire Village.  Kill phantom tennis player by clicking
with whip from pouch. Proceed to Vampire Village.  Put CD #2 in drive, hit
Enter.
Proceed directly across Vampire Village plaza, enter coffin-shaped door on
left to Chem Lab.  Go to experiment table on right.  Enter colors Red, Red,
Blue, click on switch on table to restore Lizzy.  Exit Chem Lab.
Turn around and proceed back across Vampire Village plaza, enter Firepit room
through door on left.  Take tongs from tool rack, right rear.  Proceed to fire
pit.  Take ruby ring from pouch, put in tongs.  Click tongs-ring on fire pit.
Watch.  Put blinking ruby ring in pouch.  Exit Firepit room.
Turn and proceed back across Vampire Village plaza, to end of street with
single gated arch.  Turn around once and re-face arch to reveal gate guard.
Click blinking ruby ring from pouch on guard to open gate.  Proceed to
Dracula's Castle.  Return blinking ring to pouch.
Enter Castle main hall.  Enter door on left to Dining room, click on aluminum
cover to reveal Clay, trapped in table.  You will then be left outside Dining
room door.  Turn around and go through open archway up stairs to Bedroom.
Trap Count's Lady by dropping wall bed, on left, on her.  Exit bedroom.
Watch Lizzy dance with Jeff Goldblum, as the Count.  Click on glowing parts of
his coat until you get the gold Handle.  Then watch Lizzy zap Jeff.  You will
be returned to the Dining room to free Clay.
Click on the gizmo under the table, then put Handle from pouch into right side
of gizmo's door.  Click on Handle.
Picture combination: consider picture boxes numbered 1,2,3 top row; 4,5,6
bottom row.  Click on 2, 1, 5, 3, 2.  Clay escapes.
Proceed to Coffin Ride by clicking on tunnel a few times.  Click on group of
coffins, then one remaining coffin to enter ride.  Spend ride squishing
spiders and roaches.  You are left at entrance to Monster Zoo.
Click on skeleton at right, take ticket, put in pouch.  Click on stone door to
left of skeleton, then red button, to turn on Zoo.  Proceed to burning statue
on left of walkway, give it ticket from pouch; opens door to Zoo.  Enter Zoo.
Follow passage to left of kids to Spider.  Feed Spider the roach from pouch.
Take rope under Spider, put in pouch.  Return to kids, follow passage to right
of kids to 2-headed Gator.  Click on left neck and Gator will giggle.  While
it is giggling, take magnet from behind left Gator head, put in pouch.  Return
to kids.  Follow passage behind kids to Octopus.  Put rope-magnet from pouch
into Octopus tank, snare gold key (good magnet!), put in pouch.  Return to
kids.  Use key from pouch to open locked door to left of barred passage.  Put
can of Eat-Away in pouch, throw switch in closet to open barred passage on
right.  Proceed down that passage to another barred door.
Use can of Eat-Away on lock at left, then throw switch to open this barred
door.  Watch the show.  When done, turn and proceed down arched hallway to
elevator, taking elevator to Monster Attractor control room.  Turn to left,
click on panel, play Simon, win 4 times.  Watch endgame.