Bug fix Demo : Starting a mission while moving away from planet caused issues — Unoffensible Steam update #626963

- After clicking the start mission button it was possible during the fadeout time to change the current mission. Should this occur the wrong mission would start, or the mission would never end. This should be fixed now. - Bigger enemy building can now be seen before they are entirely in view - GunTower explosions now deal less damage reducing the chance for a sequence taking out an entire group of defensive units (Missile towers are expected to be more explosive, so they still explode violently) - Fade In/Out for all missions has been improved