In this round, starlite is secured by a red and an orange gate that are controlled by switches. However, pressing wrong buttons might put the chicken in danger.

First put out the fire. Equip Maxwell with a flying device to help him move around easier. Flip the baby blue switch at far right. The blue button will be pressed. The chicken will drop to the top of the vent. Preventing the chicken form getting hurt, place an invincible immovable object above the chicken. Go into the hole at far right. Use the shovel to remove the red wall. Access the orange switch. Flip the baby blue switch at far left. Go into the hole at far right. Use the shovel to remove the red wall. Access the red switch. Retrieve starlite.

Three answers are provided here to help you obtain the crown reward.

Put out the fire: Rain, Storm, Ice
Flying Device: Wings, Talaria, Flying Shoe
Invincible immovable object: Invincible immovable case, Invincible immovable box, Invincible immovable TV
Digging: Shovel, Spade, Pick

Scribblenauts Remix 15-4 Cheats Hints gallery:
15-4-1-a: Don’t hurt the chicken!
15-4-1-b: Extinguish the fire, then drop the chicken on the vent.
15-4-1-c: Then replace the door above the vent to keep the chicken safe.