Walkthrough

If you want to finish the quest in the quickest way, then use the following walkthrough:

go west
take green_key
go east
go north
go north
go west
take blue_key
go east
go east
go north
take amulet
go south
go west
go north
take claw
go west
go north
go east
go east
go north
take ring
go south
go west
go north
take crystal_key
go west
go north
go east
take orb
activate portal