Fix duplicated moves

tween callback were called twice when player was turning, accelerating
the movement and creating unexpected behaviors.

CharTween.gd

@@ -7,7 +7,7 @@ func _ready():
 	pass # Replace with function body.
 
 func connect_into(o):
-	connect("tween_completed", o, "_on_tween_completed")
+	connect("tween_all_completed", o, "_on_tween_completed")
 	pass
 
 func move_char(c, t_pos):

Player.gd

@@ -68,7 +68,7 @@ func _physics_process(delta):
 func _on_game_start():
 	move()
 
-func _on_tween_completed(o, k):
+func _on_tween_completed():
 	move()
 
 func _on_crash(b):