Right now, I've gotten to the point in the game where I have in my inventory:

20 onions
2 tree branches
Sack
Small silver coin
Silver Key
Float Ring
Sap Tap
Bucket of Sap
Roc Feather
Coconut
Blue Rubber Ball
Iron Support

I've also finally eliminated the flat cat, the lion, the cyclops, and also given enough gold coins to the soothsayer (I've lost the exact coin count) that the last piece of advice she gave me was: "Sometimes a sticky situation can be a good thing."

The problem I have now is that I can't seem to get any further in the game. I can't seem to defeat the vampiress no matter what I do, and there appears to be nothing new for me to attempt in any location. I could be overlooking something, but if I am, I don't know what it might be.

If someone has a hint or clue for me on what to do next, I would greatly appreciate it. Thanks for taking the time to read this!