This guide teaches you how to find the Sandbox secret exit.
 

Escape from the Warehouse

You know that Cartonfall is the only time you can really go outside if you have completed it. When you win the game.
 
However, You can also illegally escape the warehouse by using Sandbox mode.
 
 

Step 1

 
Sandbox mode will open behind you when you enter it. This is the same entrance you see at the beginning of each level. As you walk out onto the level, you will notice that the roof of this warehouse isn't flat. There are openings. The openings on the side with the entrance are closed. This means that we need to look at the warehouse from the other side.
 
This side, the openings do not appear to be blocked, so we can still escape the map's boundaries.
 
 
I recommend that you use an Anti-Gravity Bomb or box to throw at the box structures on the other side of the map. Next, use these boxes to make a stairway using the anti-gravity box. This may take more than one try due to the anti-gravity physics in this game. It's best to just do it once and then move on.
 
 

Step 2

 
 

 
Once you have reached the opening, continue walking to the edge. Be careful not to slip into the void. Face the warehouse and walk to your left. When you reach the corner turn to your right. Follow the path down the path. You may need to jump over some supports. Because it was not intended to be seen by average players, the roof is completely invisible.
 
 

 
If you look down, the exit can be seen at the end of this path. Jump down from the safe spot by taking the wall.
 
 

 
 
 

The Exit

Jumping down brings you face to face the exit of the level.
 
 

 
Why is there an exit from the Sandbox? I don't know why, but I believe it is an Easter egg for patients who have a lot of patients. It doesn't matter what it is, you are here now.
 
 
You can jump quickly into the exit to the level and you will see the Sandbox mode's completion GUI. It states that it is the 43rd Level, despite the fact that there are 41 levels in the story mode.
 

 
You can't use any of the buttons here. ).
 
 

Conclusion (and level 42)

 
 
It seems that this little Easter egg isn't of much importance and is something you can look for when you are in Sandbox mode.
 
But I urge you to not leave this guide without thinking of Level 42.
 

 
Yes, that's right.
 
It's in the game files. But what exactly is it?
 
We might never know…

 
 

 
 
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