The player starts the game with 270 maximum energy. Eating a [[Stardrop]] permanently increases maximum energy by 34 points. Eating every Stardrop available in the game permanently increases maximum energy to 508. Eating certain [[Cooking|food]] can temporarily increase maximum energy, even beyond 508.
==Exhaustion==
Players become exhausted when their energy drops to 0 or below, at which point they are unable to run. Continuing energy-consuming activities without energy supply makes the player pass out, ending the day. If the player passes out anywhere outside the house, the player will lose 10% of their money up to {{price|1000}}.
If the new day's calculated initial energy level is lower than the player's actual energy level at the time he/she went to sleep, the player's energy level is left unchanged and not reduced.
==Levelling Leveling Up==The morning after a skill is levelled leveled up, the player awakens with 100% of maximum energy, regardless of the sleep or exhaustion calculation.
==History==