a street-urchin falling in love with a giant listened, chuckled and forget he was alone and monstrous. A slave to the quick, bright creatures he lived on.- I think you confused a preposition in this phrase

I like the descriptions and the settings, but I'm not sure I agree with the symbolism you employ especially at the end. Wouldn't the giant want to become human rather than create more giants? And I don't understand what the voices of the devoured others symbolize.