You get one candle and seven hours. Wax is your life. Light is your score. The wind, the cat and a suspicious incense stick all want a word. Everyone walks the same night. Very few see the morning.
Every hour burns wax. A bigger flame scores more light but burns faster. Some choices are safe. The interesting ones are not.
Every run ends one way or another. The ones you have found are filled in. The rest are still out there in the dark.
Every score is checked by replaying the run on the server. You cannot fake a good night. You can only have one.
Every chart is made of candles. This one has a face.