Here's another suggestion

Demo mode:similar to story mode but you have three floors to get through

F1:4 notebooks

F2: 7 notebooks

F3:9 notebooks

After getting through floors Baldi will sing a song called:

You beat my game you learned a lot it's good you came cuz you were taught now that you know to use your brain I'll let you go until you come again

And that's demo mode but there aren't random seeds in that mode

that is a ending, and that dude that was asking to be in onur's schoolhouse plus