The ear level of the Human Body Factory is the seventh plot in the game. Players will enter two different locations: the bone hammer and the cochlea. Then they need to lower the three cylinders blocking the bone hammer, and then click on the cochlea in sequence. The white line inside will clear the level.
1. First of all, you can see that the bone hammer in the ear is stuck by three things.
2. Then the player only needs to turn the knob to lower it.
3. Note that if the cylinder is red, turn to the left, and if the cylinder is blue, do the opposite.
4. After lowering all the columns, you can enter the cochlea position.
5. Find a white wire with current in the cochlea and click to release sound waves.
6. Then click on the white lines that the sound wave passes through in order to successfully pass the level.