ios - Scene is unreachable due to lack of entry points -

i've got game if hit enemy, go gameover screen. added view controller main.storyboard , made class gameover. however, says need entry point , when load app blank screen. thing is, dont need entry point because switching scenes in code when enemy collides player. no button "entry point" needed. how can fixed?

here code collision enemy:

func collisionwithenemy(enemy: skshapenode, player: skspritenode) {      //highscore     var scoredefault = nsuserdefaults.standarduserdefaults()     scoredefault.setvalue(score, forkey: "score")     scoredefault.synchronize()       if (score > highscore) {         var highscoredefault = nsuserdefaults.standarduserdefaults()         highscoredefault.setvalue(score, forkey: "highscore")     }      var gameover:skscene = gameover(size: self.size)     scorelabel.removefromsuperview()     enemy.removefromparent()     player.removefromparent()     self.view?.presentscene(gameover, transition: transition)   } 

set text storyboard id