Non-nullable field 'Sprite' must contain a non-null value when exiting constructor. Consider declaring the field as nullable.

Field 'Shmup.Helicopter.YVelocity' is never assigned to, and will always have its default value 0

Field 'Shmup.Tank.XVelocity' is never assigned to, and will always have its default value 0

Non-nullable field 'Sprite' must contain a non-null value when exiting constructor. Consider declaring the field as nullable.

Field 'Shmup.Helicopter.YVelocity' is never assigned to, and will always have its default value 0