Make player always going forward

CharTween.gd

@@ -12,10 +12,8 @@ func connect_into(o):
 
 func move_char(c, t_pos):
 	interpolate_property(c, "position", c.get_position(), t_pos, duration, Tween.TRANS_LINEAR, Tween.EASE_IN)
-	start()
 	pass
 
 func rotate_char(c, t_rot):
 	interpolate_property(c, "rotation_degrees", c.rotation_degrees, t_rot, duration, Tween.TRANS_LINEAR, Tween.EASE_IN)
-	start()
 	pass

Player.gd

@@ -40,36 +40,34 @@ func _ready():
 	rayRight = $RayRight
 
 func _physics_process(delta):
+	
+	if is_moving:
+		return
 
 	if Input.is_action_pressed("ui_left"):
-		if !is_moving:
-			dire -= 1
-			if dire < 0:
-				dire = 3
+		dire -= 1
+		if dire < 0:
+			dire = 3
 
-			tween.rotate_char(self, rotation_degrees - 90)
-			is_moving = true
+		tween.rotate_char(self, rotation_degrees - 90)
 
 	elif Input.is_action_pressed("ui_right"):
-		if !is_moving:
-			dire += 1
-			if dire > 3:
-				dire = 0
+		dire += 1
+		if dire > 3:
+			dire = 0
 
-			tween.rotate_char(self, rotation_degrees + 90)
-			is_moving = true
+		tween.rotate_char(self, rotation_degrees + 90)
 
-	if Input.is_action_pressed("ui_up"):
 
-		turn(dire)
+	turn(dire)
 
-		if !is_moving and !rayFront.is_colliding():
-			posix += dirx
-			posiy += diry
+	posix += dirx
+	posiy += diry
 
-			target_pos = Vector2(posix * 64 + 32, posiy * 64 + 32)
-			tween.move_char(self, target_pos)
-			is_moving = true
+	target_pos = Vector2(posix * 64 + 32, posiy * 64 + 32)
+	tween.move_char(self, target_pos)
+	is_moving = true
+	tween.start()
 
 
 func _on_tween_completed(o, k):