First of all, notice Medusa and the tree to her left, and collect just the leftmost Heart, that has two Magic Shots. Shot the Snakey to the left of Medusa, and push the egg so to block her view to the left. Collect the other two Hearts in the lower part of the room, thus activating the Hammer power.
Walk across the jewel box, shoot the Snakey and push it up. Use the Hammer power on the rightmost rock, and collect two Hearts behind Gol.
Collect all the remaining hearts.
Get back on the arrows. In order to safely get the jewel, step half-tile down, so that Gol shoots a fireball, and retreat; as soon as that fireball passes by, run to the jewel box.
