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.

utility/game_state.gd

@@ -1,7 +1,7 @@
 class_name GameStateManager extends Node
 
 ## THIS SHOULD NOT EXIST HERE BUT I AM NOT GOING TO MAKE A NEW CLASS FOR IT RIGHT NOW
-@onready var default_cursor := preload("res://resources/cursors/pointer_a.png")
+@onready var default_cursor : Resource = preload("res://resources/cursors/pointer_a.png")
 
 var placing_drone : bool = false
 
@@ -59,13 +59,13 @@ var judge_level_par : int = 0 :
 	get:
 		## Return an amount of points based on the difference between the number of drones_used and the level_par 
 		## Using more drones than the par is bad and should result in less points 
-		var diff = drones_used - level_par
+		var diff : int = drones_used - level_par
 		if diff > 0:
 			return -diff * 100
 		else:
 			return 0
 
-func _process(delta) -> void:
+func _process(delta : float) -> void:
 	if level_started and !level_complete and !game_over:
 		level_timer += delta