Refactor: Added explicit typing and void return types

- Introduced explicit typing to variables and functions across multiple scripts for better code clarity.
- Specified 'void' as the return type for functions that do not return a value.
- Removed redundant code in some scripts.

project.godot

@@ -24,6 +24,11 @@ Str="*res://utility/utility_strings.gd"
 SceneMgr="*res://utility/global_scene_manager.gd"
 HighScoreMgr="*res://utility/high_scores.gd"
 
+[debug]
+
+gdscript/warnings/untyped_declaration=1
+gdscript/warnings/inferred_declaration=1
+
 [display]
 
 window/size/viewport_width=1280