Mr. Prospector: Horiate-kun

In Mr. Prospector Horiate-Kun the player controls a dog that will have to dig through different mines to discover treasures and other objects. The character follow his father steps, since he was attacked when he was looking for a hidden treasure.
The game fautures different objects (more than 250) and equipment for the character. The digging part is similar to old arcade games like Boulder Dash or Mr Do.
There are 7 mines to explore: 1G mine” “10 G mine” “100 G mine” “1000 G mine”, “G 10,000 mines”, “G 100,000 mines”, “G million mines” And the each of them will be opened when the player fully explore the previous one. But the difficult part is that the game features the oxygen: When the character is difggin the oxygen is reducing until 0, when that happens the player will have to play that mine again.