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That could explain that.

I don't know if you accidently left it in but I was clicking around the Academy Entrance and I saw a prompt about a Developer's Room when I clicked on the bush with the pink flowers. I guess when you released 0.7.5, you might have forgot to disable the Event when the update was released. I tried it on 0.6 and 0.7.2 and no prompt appeared.

Oh gosh I forgot to disable it during bug testing. Will fix it in the next patch. XD

I discourage players from messing with the developer room because it WILL ruin your save files with unintended bugs. :))