Create enumeration Side

Store LEFT as -1 and RIGHT as +1

Make code more explicit.

Player.gd

@@ -17,6 +17,11 @@ enum Direction {
 	LEFT = 3
 }
 
+enum Side {
+	LEFT = -1
+	RIGHT = 1
+}
+
 # Movement
 var posix
 var posiy
@@ -55,12 +60,12 @@ func _unhandled_input(event):
 		if event.is_action(turn_left_action):
 			tween.rotate_char(self, rotation_degrees - 90)
 
-			dire_delta = -1
+			dire_delta = Side.LEFT
 			get_tree().set_input_as_handled()
 		elif event.is_action(turn_right_action):
 			tween.rotate_char(self, rotation_degrees + 90)
 
-			dire_delta = 1
+			dire_delta = Side.RIGHT
 			get_tree().set_input_as_handled()
 
 func _on_game_start():
@@ -83,13 +88,13 @@ func move():
 
 	generate_wall()
 
-	if dire_delta == -1 and !has_block_on_side(dire_delta):
+	if dire_delta == Side.LEFT and !has_block_on(Side.LEFT):
 		# TODO Undo sprite turn if blocked
 		dire += dire_delta
 		if dire < 0:
 			dire = 3
 
-	elif dire_delta == 1 and !has_block_on_side(dire_delta):
+	elif dire_delta == Side.RIGHT and !has_block_on(Side.RIGHT):
 		dire += dire_delta
 		if dire > 3:
 			dire = 0
@@ -104,7 +109,7 @@ func move():
 	tween.move_char(self, target_pos)
 	tween.start()
 
-func has_block_on_side(left_or_right:int):
+func has_block_on(left_or_right:int):
 	var bposx:int = posix - diry * left_or_right
 	var bposy:int = posiy + dirx * left_or_right