Terranaut Fusion: 地底フュージョン

One day, deep in the jungle, a cave suddenly appeared in the hillside. In its wall, something glittered—a gem. Climb into your handmade drilling machine and dig deep underground. But this is no ordinary cave: every time you return to the surface, it goes back to the way it was. Use the gems you collect—Kira—to upgrade your machine, push ever deeper, and uncover the ancient secret sleeping at the bottom. - DIG, EARN, UPGRADE Drill, engine, fuel tank, wheels, lights— the more you upgrade, the deeper and faster you can dig. Deeper layers hide more valuable gems and dazzling rare treasures. - OBSTACLES IN THE DEPTHS Bottomless rifts, hard bedrock, collapsing ceilings, underground rivers… Prepare the right gear and materials to break through. - THREE PUZZLES IN THE SIDE TUNNELS - Mysterious Floor: use number clues to avoid traps and dig up hidden orbs - Rune Resonance: a match-3 puzzle to…