Editing Mary O.'s Key Course

{{level infobox
|image=[[File:MaryOKeyCourse_SMM.png|270px]]
|id=B583-0000-000D-E2C1
|game=''[[Super Mario Maker]]''
|style={{SMM style|smb}}
|theme=Ghost House
|limit=500 seconds
|before=[[Mary O.'s Battle Entry|<<]]
|after=[[Coo! ("My First Task" Edited)|>>]]
}}
'''Mary O.'s Key Course''' (known as '''Key Door Course''' in the European version of the game) is [[Mary O.]]'s seventh official course in ''[[Super Mario Maker]]'', released on March 16, 2016. It is set in the ghost house theme and in the ''[[Super Mario Bros.]]'' game style. This level is reworked into [[Coo! (Yamamura's Key Course)]].

==Layout==
The level begins with some [[Dry Bones]] and a [[Mystery Mushroom]]. The first [[Key]] is located in a group of winged [[Boo Buddies]], which Mario can open a [[Key Door]] with. Afterwards, Mario should enter a [[Warp Door]], and take out a winged [[Stretch]] to obtain another Key. Mario must then reenter the Warp Door, hit a [[? Block]] containing a [[Beanstalk]], then go up it and enter a [[Warp Pipe]] to reach another Key Door. Afterwards, Mario must collect some [[Pink Coin (Super Mario Maker)|Pink Coin]]s, hit a [[P Switch]] to enter a [[P Warp Door]], then go through the warp pipe on the left and open another Key Door to be led directly to the [[Goal Pole]].

==Enemies==
*[[Dry Bones]]
*Winged [[Boo Buddies]]
*[[Parabones]]
*[[Stretch]]es
*Winged [[Stretch]]es
*[[Boo]]s
*[[Koopa Troopa]]s
*[[Skewer]]s
*[[Muncher]]s
*[[Big Dry Bones]]

==Gallery==
<gallery widths=350px>
NKS SMM Lecture Extra Part 2 modal01 img01.png|Main area
NKS SMM Lecture Extra Part 2 modal01 img02.png|Sub area
</gallery>

==Names in other languages==
{{foreign names
|Jap=カギドアを使ったコース宿題
|JapR=Kagi Doa o Tsukatta Kōsu Shukudai
|JapM="A Course That Used Key Doors" Homework
|Ita=Livello con le chiavi
|ItaM=Level with the keys
}}

{{SMM levels}}
[[Category:Ghost Houses]]
[[Category:Super Mario Maker levels]]