Extra in-game hints:
Locate numbers/inscriptions in each of the scenes to unlock extra in-game hints.
Click the crystal ball to get a hint. The first hint is free, but each hint after that costs 20 seconds. Here are the solutions:
Finding the dragon egg:
Find the top of the trowel that is somewhere on the left. Use it to dig in the ground. The dragon egg is buried.
Getting the sickle:
Pull the chain then immediately grab it.