Your playing time only starts when you check in at the entrance gate, you need to keep track of the playing time yourself.
If you are in doubt about how much playing time you have left, you can have your ticket scanned at the reception desk or consult the info screen in the hall.
If you (want to) check out too late, there may be extra costs involved, these costs are € 7.50 per person.
You also need your ticket to check out, so don’t lose it and store it safely (not folded)!