Auto Doors is the first level of Advanced Extra in Super Monkey Ball 2 and Super Monkey Ball Deluxe. It features Automatic-like Doors that open and close with a fixed pattern and it has a fast-forward switch that you automatically press at the start of the level. To make this level easier, just roll back behind the starting point and press the play switch to slow the Auto Doors.
The only goal in this level is a blue goal. To reach it, just hold forward when the doors open. The farther you get, the faster the doors move. There's a slow down switch behind the start.