It seems very odd to have a clean, green refrigerator in there; maybe it should be rusty and yellowed with thick dust or something. Also the oil drum closest to the camera seems to have a worn blue paint and plaster material. If you zoom in on the rocks they lack detail; DOF might help with that. And the floor’s normals could be a little softer I think. You might try adding a rusty bicycle at the back wall (it feels empty back there).
Just throwing out some ideas. It looks really great how it is though! Keep it up!