Beat 1-Fortress
Activate Yellow Switch
Find a secret exit in 1-2
Beat 1-Castle
Collect all A Coins in World 1 (see comment)
Activate Red Switch
Find a secret exit in 2-4
Beat 2-Fortress
Beat 2-Castle
Collect all A Coins in World 2 (see comment)
Collect all A Coins in World 3 (see comment)
Beat 3-Fortress
Beat 3-Castle
Find a secret exit in 3-3
Activate Green Switch
Find a secret exit in 4-4
Beat 4-Fortress
Beat 4-Castle
Collect all A Coins in World 4 (see comment)
Activate Blue Switch
Find a secret exit in 5-5
Beat 5-Fortress
Beat 5-Castle
Find a secret exit in 5-6
Collect all A Coins in World 5 (see comment)
Beat 6-Fortress
Find a secret exit in 6-5
Beat 6-Castle
Collect all A Coins in World 6 (see comment)
Beat 7-Fortress
Beat 7-Castle and rescue Mario
Collect all A Coins in World 7 (see comment)