Am I punching trees or pounding sand?

character/character.gd

@@ -1,4 +1,4 @@
-extends CharacterBody2D
+class_name Character extends CharacterBody2D
 
 var _grid_pos: Vector2i = Vector2i.ZERO
 var _grid_tween: Tween = null
@@ -6,11 +6,10 @@ var _grid_tween: Tween = null
 var _cached_dir: Vector2i = Vector2i.ZERO #used for reversing the current input
 
 func _physics_process(delta: float) -> void:
-	#WARNING: this has the potential for getting stuck
 	if _grid_pos * 32 == Vector2i(position):
 		_check_grid_move(delta)
 
-func _check_grid_move(delta: float) -> void:
+func _check_grid_move(_delta: float) -> void:
 	if Input.is_action_pressed("input_north"):
 		_set_grid_move(Vector2i.UP)
 	elif Input.is_action_pressed("input_south"):