You have to avoid falling powder kegs and lightning clouds as well as two sharks in the water. Press the green button to open the gate and access the starite.

1. Put a BATTERY in the water near one shark, and do the same with the other shark. They will both die. Wait for the green button to fall into the water and put IRON (MATERIAL) on it. Then give Maxwell a JETPACK and carefully fly to the starite.
2. Put DEATH in the water to kill both sharks. Wait for the green button to fall into the water and put a BOULDER on it. Then give Maxwell WINGS and carefully fly to the starite.
3. Put a TV in the water near one shark, and do the same with the other shark. They will both die. Wait for the green button to fall into the water and put a TANK on it. Then give Maxwell WINGED UNDERWEAR and carefully fly to the starite.