There was a NES game where you were a superhero and a green lady with a green planet in the background talks.That isn't Captain Planet, is it?
The first level; you are in a space ship and you must shoot enemies. You can change bullets from rocks, fire, water, if I remember correctly. The boss from first level is a base that shoots you. You must destry it and land on the pod to finish the level.
The second level; you enter in that base and to pass some enemies and obstacles you have to transform in water, air or fire. The level 2 boss is not really a boss, but obstacles, two claws more exactly.
And level 3; you are a chopper and you have to stop three trucks by droping rocks in front of them.
Thats all I remeber.
I really need to find that game!