I couldn’t figure out how Bones worked at first so maybe this could be useful to someone. The arrow directions are not random. They point in the direction that the other bones are.
Guide to Play Bones
This is just a simple explanation of how the game works. The most important thing to know is that the arrows are not random.
This image shows how the green arrows work. There is a bone above and a bone to the left, so you can either press up or left. This will pick up the current bone and move to the one in the direction you chose.
This way you can plan out what order you want to pick up the bones before you throw the stone.