The best description of the mood that is created by the language in this excerpt is proud and defiant.
The language used in the excerpt from "Manhattan Tropics" by Guillermo Cotto-Thorner creates a mood that can be described as proud and defiant.
Yes, you are correct. The language used in the excerpt conveys a sense of pride and defiance, as it highlights mankind's victory over limitations and the determination to conquer new heights.