Yeah, that's actually the exact effect I was going for, lol. It's meant to say "exit", but not quite like actual letters, with the four symbols below it showing the code you need to enter to get the secret ending. (h°4J) You need to use your imagination a little bit...
Viewing post in Teratomachine: grey loop comments
Thank you very much, I have found the hidden ending. Looking back, as you said, it requires some imagination. In fact, I was almost there because I thought of entering the code, but at that time I couldn't find the same symbol as in the painting. So I got stuck and kept playing again. I feel a bit foolish.