How is the SMM2 stage "Do not... look... left..." implemented?

I saw some interesting course in Super Mario Maker 2, for example, the 1st course in this video.

I don't understand how it's made, maybe some enemies hiding over the ceiling? How can I use this mechanic?

super-mario-maker-2

Pictures about "How is the SMM2 stage "Do not... look... left..." implemented?"

How is the SMM2 stage "Do not... look... left..." implemented? - Man Wearing Teal Dress Shirt

How is the SMM2 stage "Do not... look... left..." implemented? - Text On Black Background

How is the SMM2 stage "Do not... look... left..." implemented? - A Group of People Playing Musical Instruments on Stage

How do you make a traditional level smm2?

Come up with an idea. ...

Think of a theme. ...

Choose a mechanic and everything to include in the level. ...

Start by introducing the main mechanic(s) and objects. ...

Add easy challenges and breathing space. ...

Add a checkpoint and more breathing space. ...

Add a final challenge and end the level. ...

Playtest the level and upload it.

What is the most popular level in smm2?

Switch x Switch is currently one of the most popular levels in the game, emphasizing the true diversity of these blocks over a range of platforming challenges.

How many copies of smm2 have been sold?

It was the best-selling game in Japan during its first two weeks of release, selling 279,357 physical copies. By the end of March 2021, the game had sold over 7.15 million copies worldwide, making it one of the best-selling games on the Switch.

What do footprints mean in Mario Maker 2?

Footprints are indeed the number of times that someone has played your level EDIT: the number of unique players, apparently. If you know that you have plays that aren't showing up, I would try quitting out of the game and reloading it to force the stats to refresh. 2. Additional comment actions. More from r/MarioMaker.

How to Make A “Backwards Only” Level in Super Mario Maker 2!

Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.

Images: cottonbro, Arvind shakya, Anna Tarazevich, cottonbro