Refrigerator door left slightly ajar all day.

Is everything that could spoil- spoiled?

Nothing is really cold to the touch. It all feels like it had been stored in a cooler but without any ice.

some might some might not. Depends on how far the door was open and how full the frig was.

The stuff in the back will probably be okay. Anything in the door - particularly easy to spoil things, may quite possibly be bad. There are too many factors involved, I personally would toss anything that spoils easily.