I feel like if Penelope had used the fang to return home, Leila might've had a chance to rewind time one more time, but because Penelope destroyed the fang by using it on Callisto (maybe it wouldn't have been destroyed otherwise) Leila has no chance of rewinding time anymore, and thus the "game is over".
I feel like if Penelope had used the fang to return home, Leila might've had a chance to rewind time one more time, but because Penelope destroyed the fang by using it on Callisto (maybe it wouldn't have been destroyed otherwise) Leila has no chance of rewinding time anymore, and thus the "game is over".