fixed stuck rain

refactoring

Scripts/Elements/Element.cs

@@ -32,8 +32,7 @@ public class Element{
         Position.X = x;
         Position.Y = y;
         Chunk = chunk;
-        lastMove = Engine.GetFramesDrawn();
-        Active = false;
+        Active = true;
     }
 
     public bool Active {
@@ -43,6 +42,8 @@ public class Element{
 
             active = value;
             Chunk.SetElementActive(this, value);
+            lastMove = Engine.GetFramesDrawn();
+
             if (!active)
                 ResetColor();
             else
@@ -93,6 +94,7 @@ public class Element{
             Chunk.Swap(this, Position + Vector2I.Down);
     }
 
+    /// <returns>-1, 0 or 1</returns>
     protected Vector2I RandomDirectionDown() {
         int randomDirection = GD.Randi() % 2 != 0 ? 1 : -1;
 
@@ -133,4 +135,8 @@ public class Element{
     public void MarkForUpdate(bool mark = true) {
         markedForUpdate = true;
     }
+
+    public bool IsEmpty() {
+        return GetType() == typeof(Element);
+    }
 }