Move the character to the right and left keeping away from the spikes on the ceiling, and dive deeper into the shaft. The character will die if he falls all the way to the bottom. Touch the right half of the screen to move to the right and the left half of the screen to move to the left.
The character has the "Life", and he will die if he runs out of it. The "Life" decreases when the character touches the spikes, but he can recover it by landing on the normal floors.
If your score is among the top 10, you can register your name to the ranking, and also upload it to the world ranking on the Internet.