In a room inspection they are usually just checking that you haven't got illegal or dangerous things going on, like animals (yes, some people bring hamsters or fish), mini-fridges, fairy lights, candles, oil burners and so forth. They look for damage or vandalism, make sure you haven't disabled the smoke alarms or let off the fire extinguishers.
They might tell you if they think your room is a mess (they did me, haha) but they can't fine you for that.