Take the red hammer and smash 5 stone blocks
in the shown order.
Then wait for the flame monster to remove
the marked ice block.
Take the green hammer and
release the rolling monster.
Move to the left while the monster is
switching the lasers on and off.
Then go down to the cyan pot.
Remove the ice block.
Break the stone blocks like in the image.
The rolling skull will destroy 3 purple skulls.