Area 2-C is opened if Area 1 is cleared with a level of 8 or higher.
Area 3-B is opened if Area 2 is cleared with a level of 18 or higher.
Area 4-C is opened if Area 3 is cleared with a level of 26 or higher.
Area 4-D is opened if Area 3 is cleared with a level of 32 or higher.
Area 5-B is opened if Area 4 is cleared with a level of 38 or higher.
Area 5-C is opened if Area 4 is cleared with a level of 53 or higher.
Area 6-B is opened if Area 5 is cleared with a level of 52 or higher.