The introductory room is very easy. Even the Snakeys are just for decorations. Simply walk around the room and collect all of the Heart Frames however you please. Then collect the key.
Starting with the Heart Frame in the lower left corner of the room, work your way around the room in a clockwise direction, collecting each of the Heart Frames.
You should end with the Heart Frame in the lower right corner. Once you collect this, the Gols will wake up.
Push the Emerald Frame to the left until it is one space away from the left wall. Then push it up in front of the Gol along that wall. Then collect the key.