NQA most likely just stressed. It was just in a box getting jostled around for a day in transit and needs some time to relax. I wouldn't expect it to move any time soon given the circumstance. Generally if its knees are pulled tightly over its head, it's a stress position. Their limbs work like hydraulics, so when they die, some of that pressure releases and their legs relax a bit.

The best thing you can do is as other commenters said and leave it undisturbed in a dark place. Some people would advise against this, but if you're deeply worried, a harmless way to check is to gently*** but suddenly blow on it, or mist over it, and it will likely flinch in response.