I've done my 5th level called 30 Minutes Level
I've made this level in 30 minutes btw so stuff that I've haven't done will be left unfinished meaning that it wont be implemented to this level
For RAR Users https://www.mediafire.com/file/f09nrxpblz7ro1r/30+Minutes+level.rar/file
For ZIP Users https://www.mediafire.com/file/u7h7u0u91s6z2io/30_Minutes_level.zip/file
For PC users: Make sure you extract the file then go to this location C:\Users\yourpcname\AppData\LocalLow\JohnsterSpaceGames\Baldi's Fun New School Plus Ultimate Edition\Floor Customizer and then put the folder here After you're done launch bfns+ then click on game mode and click on floor customizer and find the map from the right side and you should see the map you installed
For Android users: go to android/data/com.johnsterspacegamesbaldifunnewschoolplusultimateedition/files/floorcustomizer and the custom floor is need to extracted (but if you need zarchiver good luck) paste on floor customizer and done! (credits to principal gaming for the tutorial)