You are a bat that once lived in this cave. In the darkness where nothing can be seen with your eyes, you must use **echo** to understand the surrounding structure and continue to descend while avoiding four types of predators hiding deep within the cave.

Find your way in the dark, read the rhythm, and descend as deep as possible.

If you keep going like this… you might eventually see the end of the cave.

Recommended Play Environment

• We recommend setting the brightness close to 0.

• We do not recommend using Fullscreen unless your monitor has a 16:9 aspect ratio.