Okay I just checked the game and my plans.
The event needed to unlock the cafeteria is available until level 4. That is also intended, as by that time it will have to be unlocked to progress the game further.
Also I can’t reproduce the problem of not getting the overwhelmed scene at 6+. Just tested it and it came up multiple times. Maybe you just had really bad luck.
And if you mean with ground the courtyard, I found an event that wasn’t supposed to run at level 6+, which resulted in missing images. I fixed that.
I’ll still keep your report on the cafeteria and courtyard in mind, in case something still comes up.