If you run out of time, you get:
- A monster that despawns and you don’t know if you killed it if it was almost dead
- A success message that you completed it (you didn’t, you ran out of time)
- No upgrade for glyph (which is how you know you failed)
- When exiting, you get the warning about unspent glyph upgrades (which aren’t awarded, cause once again, you failed)
I get that failure is a concept that many people deny that it exists, in this era of exaturated positivity, but I do consider this a bug.