Gooseboy.

Vigo is a nerdy teenage boy who lives in a fictional world and simulates a virtual game called “Gooseboy,” which enables him to become free as a flying bird. One beautiful day, to the surprise of the boy, a goose accidentally bumps into his balcony. It appears that the gander can speak human language, but sadly he is not able to fly. Vigo and the goose embark on a journey to the north and try to find and catch up with the gander’s flock.