"ルナたん 巨人ルナと地底探検" is a free puzzle game developed by NTT Plala Inc. for Android devices. In this game, you play as Jonah, a descendant of the ancient civilization Aquae, who has lost his way. With the help of the magic power of the giant Luna, your goal is to excavate the parts of the buried ancient civilization. As you dig deeper underground, you will uncover ancient plants, animals, and buildings, gradually revealing the secrets of the ancient civilization Aquae.

The gameplay is simple - you just need to break and tap the blocks to horizontally align them. Be careful though, as your life will decrease if you make a wrong move. The goal is to dig down to the bottom layer to clear each stage.

To aid you in your exploration, you can collect capsules containing ancient plants and animals. These companions will invoke the magic of the giant Luna. Additionally, collecting parts of the ancient civilization and placing them on the ground will make your surroundings more lively.

Make sure to keep an eye out for mana energy on each stage, as it is essential for using Luna's magic. The game is recommended for Android devices running on Android 4.1 or later, with at least 2GB of memory.