The monkey has visited everywhere, but there are still places where its paws have not set foot and its help has not been provided, and in the game Monkey Go Happy Stage 904 you will find yourself in such a place. These are the crystal caves that two characters are going to explore. But they do not have enough tools, as well as a container where they could put the crystals they have mined. You will help them not only find the pickaxe, but also get the crystals yourself and put them in a wooden basin. Monkey Go Happy Stage 904 is inspired by the strategy game Crystal Cave.
