Hi, xstar and welcome to the forum! Well, it definitely sounds like your little one is unhappy about something. The three most common reasons for this are as follows. As you said, it could be too dark for her. When pleos are in an area where the light level is too low, they will cry, curl up, do a lot of whining, and chin scratching with one of their front paws. If it is dim in your place to you, it is definitely too dim for her. The brighter the better with these guys.
The second problem could be her feed level. If her play area is too dark, she may very well not want to eat because of low emotion. You say she isn't taking her food leaf at all? are you offering the correct leaf? There are three leaves included with the basic pack. the one you want to give her is the conifer leaf. I'm totally blind so... um I'm not sure how to describe it to you. It's surface is very... um lined- sort of separated into needles. *Shrug* It kind of reminds me of a Christmas tree. If you are offering the mint leaf, they will not take that one at all unless they're sick. The mint leaf has a ruffled edge. If you are offering the rubber training leaf, it has no RFID chip and she will not recognize it as food. The training leaf looks a little like a maple leaf but with some red in it- it sort of has an Autumn look to it. Oh and you can't just shove the leaf into her mouth, she has to recognize it as food so put it under her chin first. When she raises her head to take it, then put it into her mouth and she will crunch on it.
The third problem could be the time of the day you are playing with her. When you hatched her, did you set her clock for your actual noon time? If you did, her bedtime will be somewhere around ten PM and her wake time will be somewhere around seven a.m. My crew are unhappy and uncooperative if I play with them past their bedtime or after the sun has gone down and it's very dark. Sorry for the miniature novel, and if you knew any of this I hope I didn't come across as condescending. I hope some of this was helpful. We're all here for you!
Talon