2. Get the key at the far right of the beach.
3. Go to the far left of the desert, at the top of the pyramid and become a mouse.
4. Go to the far left of the mouse world and become the Piranha.
5. Get the 4th heart and go home.
6. Go to the far right of the desert (buy the dragon mail armor in the middle shop) and get the thunder ring. You can now break some cubes.
7. As Piranha, go underwater and break the cubes and become Lion.
8. Get 5th heart bottom.