Left Bracket

Use the Mannn icon to Teleport to spawn
Use the Eraser to Erase items
Use the Rocket to Erase EVERYTHING
Use the Mute icon to Stop all sounds

Can you unlock the secrets?
Here's how to unlock the secrets.

Karstennn Clone [End of level]

Bear [End of level again]

Eye of Jack [End of level again again]

Steve [Recovery Center Turtle + Bear]

FNF [Touch Prison Steve]

Prison Bars [SpongeBob Death]

Crying Child [Staplers + Yellow Guy]

Vault Door [Crying Child + Springtrap]

Wizard [Press Right Bracket]

Springtrap [FNF Score of 12]

Trumpet [Mannn + No]

Left Bracket Boy [Press Left Bracket]

Vacuum [Mannn + Bugs]

Patty Wagon [Vacuum + Left Bracket Boy+ Springtrap+ Trumpet]

Liam [Vacuum + Left Bracket Boy+ Springtrap+ Trumpet+ Wizard+ Crying Child+ Steve+ SpongeBob+ Patty Wagon+ No]

Lose Points [SpongeBob]

Gain Points [Crying Child]

.exe version will allow multiple instances of the same sound to play, making it an even worse experience. 
I like it better.