Problem with give up -button

Hi, this is my first project in Unity and I'm making a simple 3D platformer. (I'm on a course where we learn the basics of making 3D and 2D games in Unity) Every time you finish/fail a level, you see a screen that says "Level Completed!", "Continue" or "Level Failed!", "Restart". I'm trying to give the player the option to give up but I can't get it working. We were given the following script:

 void OnGUI() {
         GUI.skin.label.fontSize = 20;
         GUI.skin.label.alignment = TextAnchor.MiddleLeft;
         if (levelComplete) {
             
             if (LevelEndMessage("Level completed!", "Continue"))
             {
                 int nextLevel = Application.loadedLevel + 1;
                 if (nextLevel >= Application.levelCount) nextLevel = 0;
                 Application.LoadLevel(nextLevel);
             }
         }
         else if (levelFailed) {
             
             if (LevelEndMessage("You tried.", "Keep trying"))   
                 Application.LoadLevel(Application.loadedLevel);
             if (GUI.Button(new Rect(Screen.width/2 - 200/2, Screen.height/2 + 100, 200, 50) "Give up")) Application.LoadLevel(0);
         }
 
         else {
             GUI.skin.label.alignment = TextAnchor.MiddleLeft;
             GUI.Label(new Rect(10, 10, 200, 30), "Time:" + (Time.time - startTime).ToString("#"));
             GUI.Label(new Rect(10, 40, 200, 30), "Collected:" + collected + "/" + numTreasures);
         }
     }

and I can't get it working. If I switch the

 else if (levelFailed) {
                 
                 if (LevelEndMessage("You tried.", "Keep trying"))   
                     Application.LoadLevel(Application.loadedLevel);
                 if (GUI.Button(new Rect(Screen.width/2 - 200/2, Screen.height/2 + 100, 200, 50) "Give up")) Application.LoadLevel(0);

for

 else if (player == null) {
 //changed that ^                
                 if (LevelEndMessage("You tried.", "Keep trying"))   
                     Application.LoadLevel(Application.loadedLevel);
                 //if (GUI.Button(new Rect(Screen.width/2 - 200/2, Screen.height/2   //+ 100, 200, 50) "Give up")) Application.LoadLevel(0);
 //remove that ^

I can play the game and restart after death, but I can't give up. I'm a beginner (at best) at coding so I don't know if this is enough information for troubleshooting. The game won't run and it gives the following errors for the line that I removed: "A new expression requires () or [] after type" and "Internal compiler error during parsing, Run with -v for details".

Thank you and sorry if this is a common rookie mistake that I should be able to fix on my own.