Happy Digging: Idle Miner Tycoon is a free simulation game developed by Immortal Chicken for Android devices. The game allows you to dig mines, earn gold, and collect minerals while exploring the mysterious underworld. The game aims to become a gold tycoon by upgrading your drill machine using mined gems and diamonds.

The game's graphics are excellent, with a cartoonish look that fits the game's theme perfectly. The gameplay is straightforward to understand, making it an ideal game for those who are new to the simulation genre. The game's controls are also user-friendly, with the ability to tap to pick rewards, making it an addictive idle and clicker game. The game also has a unique feature that allows you to explore the deep world and find treasure chests, adding an extra layer of excitement.

Overall, Happy Digging: Idle Miner Tycoon is a fun and addictive game that is worth checking out if you're a fan of the simulation genre. It's perfect for those who are looking for a game to play in their free time and the fact that it's free means that it's accessible to everyone.