Each exit has two potted plants, two windows, and hall lights attached to the ceiling. There is also a hanging sign with red "EXIT" text.
Overview
Main gameplay
There are four exits in the Schoolhouse. One at the starting point, two in the other hallways, and one in the cafeteria. The exits appear visible but the player cannot go through the swinging door. They will be blocked and lowered when the player answers a problem wrong.
Once the player collects all 7 notebooks, the exits will reappear. Heading to one of the fake exits lowers and blocks it off, a quiet ambience will start playing, and the entire school becomes red and gets dark shadings. Heading to another fake exit makes an increasingly loud bass-boosted noise until the player gets caught by Baldi or wins. When the player reaches the exits except for the last one, they will change into maps, showing a layout of the Schoolhouse.
The player must go to all four exits in any order to win the game. When the player escapes via the fourth exit, a certain ending will appear, depending on the number of math questions the player answered incorrectly.
There is an exit that does not work. This exit is next to a large globe in a faculty room with a Swinging Door Lock, but there is only a sign above the globe and no doors. Reaching this exit does not make the player progress in the game.
The hallway after reaching the first exit in Classic/Birthday Bash.
In Baldi's Basics Classic, the red light does not affect characters, items, nor sprite objects and it does not consist of dark shadings. Also, the exit signs have a different design.
In Baldi's Basics Birthday Bash, the exit from the cafeteria will become accessible when triggering the other three fake exits. In a faculty room from the glitched school, there is a minimized and tilted exit connected with the outdoor area along with a wall above that blocks it. Like in Classic, the red light does not affect characters, items, nor sprite objects and has no dark shadings. Also, the exit sign's design is different.
Trivia
General
Exits have swinging doors but they function differently and are purely for aesthetic reasons besides detecting collision once the player has triggered 3 exits.
Prior to V1.1, there were no maps for the fake exits.
The floating exit sign next to the cafeteria exit.
All of the exits in the game feature two plants, two windows, two walls, one floor, one fake swinging door, one "EXIT" sign, and the same type of ceiling. Due to the fact all exits have an exit sign, it means a floating exit sign can be spotted in the cafeteria, as it's not connected to a ceiling.
In Endless Mode, the exits can only be seen before the player answers a problem wrong. They do not reappear even after collecting 7 notebooks.
Through hacking in both modes, the exits are found underneath the map, as well as the large walls that block them.
The sound the first exit location makes when disappearing is called "MEC_SLINGSHOT". According to mystman12's Twitter,[1][2] this sound was intended to be used in a pinball game he was working on.
By enabling all characters in the beginning of the game by hacking, it is revealed that they cannot move to the exit areas except for It's a Bully. This is due to the exit areas not having a walkable NavMesh for those characters.
Baldi's Basics Classic
The red color that the school turns into when the first exit is reached was actually made darker since V1.3.
The sound that is emitted when reaching the first fake exit.
A "UFO-like" synth noise is heard in a looped audio after reaching the first exit.
A loud bass-boosted noise, with its intro starting to play before looping after the player reached the second fake exit. As the noise progresses after reaching the third fake exit, it will soon grow louder while slowly turning into a painful sound resembling a speeding car shifting its gear, before looping the louder part.
The first noise also plays in the Kickstarter promotion video where Joshua Valent did a T-pose when mystman12 bursts out laughing about the "lore", and it was also used in the "Thank You" video after the Kickstarter reached its goal.
The exit sign at the exits in Classic/Birthday Bash.
The plant pot used for each exit's both sides.
Baldi's Basics Classic
The exit from the current screenshot.
The exit from the pre-updated screenshot.
Baldi's Basics Birthday Bash
The exit from the screenshot.
References
↑"Look at a redesigned, much more reliable bus lock in #JoesUltimateBusRide! Oh yeah I'm still working on Joe's Ultimate Bus Ride btw. :P Actually, earlier this year I deleted nearly all my code and have started from scratch. The old code was a mess, since it spanned many..." - mystman12. December 18, 2017. Twitter
↑"Those would all be cool features for sure! Fun fact though, I never actually considered putting a slingshot in until LostBits video mentioned it. The file named "MEC_SLINGSHOT" was actually a sound used for the slingshots in the pinball game I've been working on." - mystman12. June 14, 2018. Twitter
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