Party Hall Escape

People do not have time to gather strength after the recent alien invasion as a new threat. This enemy, too, from the depths of space, but its technology is a hundred times better than that of the previous occupants. They used their weapons and almost all the people are gone. You were at a party in honor of the New Year. Few survived after the attack and you are among the elect. All are gone, and you need to leave the building to fight against the aliens.