Volcania

Hint: I'm on the island, but where's the center of the earth?

Hint: How do I keep from burning to death on the surface?

Hint: How can I get the black pebbles from the ceiling?

Hint: Where do I find the bait to use on the tyrannosaurus-type monster?

Hint: How do I get into the altar?

Hint: Where is the exit from Volcania?