When I went to bed last night I was fine. When I came back this evening after work, instead of standing there sleeping, I was dead. Not sure how I could burn energy and mood like that while doing nothing...
Colette, one loses energy and mood naturally throughout the game day. The ratio is something like 0.8% every few minutes. If you don't want to die while you're away from your computer you should log out of the game by exiting the game or closing the tab or window Glitch is open in.