Solution:

Open doors.

Solution:

No human footprints.

Footprints in snowy weather are inevitable. Therefore, while the dog leaves paw prints in the snow, its human companion doesn't.

Solution:

The ghost is marked in the picture below.

Solution:

Ghosts don't sweat, so the girl in the center is not a ghost.

Solution:

Bottom one

Solution:

No road to the right.

Solution:

According to the clock, sunset is impossible at this hour.

Solution:

Min and Max are on the opposite side.

Solution:

The door hinges are on the opposite side.

Solution:

It's the Man with the flash light.