updated the readme file

I updated the README.md file and corrected some comments.

README.md

@@ -1,5 +1,7 @@
 # Godot Click Through Transparent Window
 This is a demo project for the Godot Engine that features a transparent window with click-through capability and a Godot icon that moves randomly when clicked.
+
+*This branch is compatible with Godot 3.5.2 LTS version. For the version that supports Godot 4, please check the `godot-4` branch.*
 ## Screenshots
 ![GIF](https://media.giphy.com/media/v1.Y2lkPTc5MGI3NjExOTQ3MjM3MTYxN2EyYWY1MjQ3NmZhOTg5YTI5ZGExZjlkZTExYjRjNyZjdD1n/n2B0EPwIOxKJWTq5qy/giphy.gif)
 ## Usage

src/Scripts/Canvas.gd

@@ -27,8 +27,9 @@ func _update_size_settings() -> void:
 
 
 func _update_transparency_settings() -> void:
-	# Enabling Per Pixel Transparency -> Allowed through code doesn't seem to
-	# work correctly. Make sure to enable it via the Project Settings menu.
+	# Enabling Per Pixel Transparency -> Allowed through code doesn't work, as
+	# the global variables ProjectSettings contain aren't updated when changed.
+	# Make sure to enable it via the Project Settings menu.
 #	ProjectSettings.set_setting("display/window/per_pixel_transparency/allowed", true)
 #	OS.set_window_per_pixel_transparency_enabled(true)
 	# You'll need to change this setting during runtime as it concerns the

src/Scripts/Godot.gd

@@ -20,8 +20,7 @@ func _update_click_polygon() -> void:
 	OS.set_window_mouse_passthrough(click_polygon)
 
 
-# A simple function that changes the position of the Godot icon randomly and
-# prints "Clicked" when the icon is clicked by the mouse.
+# A simple function that changes the position of the Godot icon randomly.
 func _on_ClickArea_input_event(_viewport: Node, event: InputEvent,
 		_shape_idx: int) -> void:
 	if event is InputEventMouseButton and event.is_pressed():