What do you do at the castle on vampire's curse island?

Answer 1

To reach the castle:

Get the crowbar and Teen Novel from the crypt in the cemetery, then use the downspout from the second crypt to send water from the pump into the moat. Enter the grounds and use the crowbar to pry out the rock at far left. Roll both boulders into the geysers, then get one more from the rock steps at the right side. Ride the stream of water up to the broken window.

In the Great Hall (Library):

Use the log, and some pages from the Teen Novel to start a fire (jump on the bellows three times). Push the rolling ladder to the left so you can climb up the bookcase and stone shelf to reach the first chandelier.

Take a candle from the fireplace, light it in the fire, and carry it up to light the chandelier. Then get another candle, light it at the first chandelier, and jump over to the right to light the second one. Repeat with new candles for the other two , and the room will be well lit.

Pick up the glass eye at the left and put it in the tiger head atop the bookcase. Use the key to open the armory, and get the crossbow. Load a cannonball and go back to get a lighted candle to set it off (repeat three times). After you shoot a hole in the roof, take the water bucket outside (the crowbar will open the chained Library door) and get some water. Back in the attic, shoot the crossbow into the left side wall so you can climb from the plant to the top room. Take the boards off the windows and water the plant, and it will grow into a beanstalk that you can climb to the Laboratory in the castle tower.

(see the related full solution question below)