fixed checkpoints and AI

Assets/Scripts/GameManager.cs

@@ -36,8 +36,17 @@ public class GameManager : MonoBehaviour
         {
             GameObject player = players[i];
 
-            if (playersFinished.Contains(player.name) || playersFinished.Contains(player.name + " (player)"))
-                continue;
+            try
+            {
+                if (playersFinished.Contains(player.name) || playersFinished.Contains(player.name + " (player)"))
+                    continue;
+            }
+            catch
+            {
+                return;
+            }
+
+            
 
             bool isAI = true;
             if (player.GetComponent<PlayerController>().enabled)

Assets/Scripts/PlayerController.cs

@@ -1,5 +1,6 @@
 using System.Collections;
 using System.Collections.Generic;
+using System.Linq;
 using UnityEngine;
 
 public class PlayerController : MonoBehaviour
@@ -125,10 +126,21 @@ public class PlayerController : MonoBehaviour
     private void Update() {
         Transform currentCheckpoint = checkpoints[checkpointsCollected].transform;
         float checkpintDistance = distanceToCheckpoint(currentCheckpoint);
+        
 
         if (checkpintDistance < 0.1f)
         {
             checkpointsCollected += 1;
+            currentCheckpoint.GetComponent<Checkpoint>().isVisible = false;
+
+            Transform nextCheckpoint;
+
+            if (checkpointsCollected <= checkpoints.Count() - 1)
+                nextCheckpoint = checkpoints[checkpointsCollected].transform;
+            else
+                nextCheckpoint = checkpoints[0].transform;
+
+            nextCheckpoint.GetComponent<Checkpoint>().isVisible = true;
         }
     }