Understanding different perspective

Alyssa and Omar are building a castle out of cardboard for a class project they're working on. Omar is standing back, admiring their castle, while Alyssa is madly cutting and pasting a dungeon together. The final school bell rings.

"I think the castle looks great! We're totally going to get an A!" Omar shouts as he starts to run off. "Gotta go!"

"What? Wait! We're not done! Can't you see I'm still working on it? Get back here!" calls Alyssa angrily.