Added comments

Assets/Scripts/Grid.cs

@@ -10,29 +10,20 @@ public class Grid : MonoBehaviour
     public static Transform[,] grid = new Transform[w, h];
     public static int count = 0;
 
-    // Start is called before the first frame update
-    void Start()
-    {
-
-    }
-
-    // Update is called once per frame
-    void Update()
-    {
-
-    }
-
     // Round Vector to full numbers
     public static Vector2 roundVec2(Vector2 v)
     {
         return new Vector2(Mathf.Round(v.x), Mathf.Round(v.y));
     }
 
+    // Check if group is inside borders
     public static bool insideBorder(Vector2 pos)
     {
+        // (x >= 0) and (x < w) and (y >= 0)
         return ((int)pos.x >= 0 && (int)pos.x < w && (int)pos.y >= 0);
     }
     
+    // Deletes a row
     public static void deleteRow(int y)
     {
         count++;
@@ -43,12 +34,7 @@ public class Grid : MonoBehaviour
         }
     }
 
-    public static void decreaseRowsAbove(int y)
-    {
-        for (int i = y; i < h; ++i)
-            decreaseRow(i);
-    }
-   
+    // Move row one down
     public static void decreaseRow(int y)
     {
         for (int x = 0; x < w; ++x)
@@ -63,6 +49,14 @@ public class Grid : MonoBehaviour
         }
     }
 
+    // For all rows, call decrease row
+    public static void decreaseRowsAbove(int y)
+    {
+        for (int i = y; i < h; ++i)
+            decreaseRow(i);
+    }
+
+    // Check if the row is full
     public static bool isRowFull(int y)
     {
         for (int x = 0; x < w; ++x)
@@ -71,6 +65,7 @@ public class Grid : MonoBehaviour
         return true;
     }
 
+    // If the row is full, remove it, decrease all above and increase fall speed
     public static void deleteFullRows()
     {
         for (int y = 0; y < h; ++y)

Assets/Scripts/Group.cs

@@ -28,9 +28,7 @@ public class Group : MonoBehaviour
         Color randomColor = Random.ColorHSV(0f, 1f, 1f, 1f, 0.5f, 1f);
         foreach (Transform child in transform)
         {
-            print("Foreach loop: " + child);
             rend = child.GetComponent<Renderer>();
-
             rend.material.color = randomColor;
         }
     }
@@ -120,6 +118,7 @@ public class Group : MonoBehaviour
         }
     }
 
+    // Check if position in grid is valid
     bool isValidGridPos()
     {
         foreach (Transform child in transform)
@@ -139,6 +138,7 @@ public class Group : MonoBehaviour
         return true;
     }
 
+    // Update the grid
     void updateGrid()
     {
         // Remove old childs from grid

Assets/Scripts/Spawner.cs

@@ -28,10 +28,12 @@ public class Spawner : MonoBehaviour
     {
         if (Input.GetKey(KeyCode.Escape))
         {
+            // End the game
             Application.Quit();
         }
         if (Input.GetKey(KeyCode.F1))
         {
+            // Restart the game
             restart();
         }
     }