The Ghost Tower is the boss of stage 2 of Makaimura for Wonderswan, a sentient fortress-like demon that attacks Arthur after going through it for most of the stage.
The Ghost Tower has two attacks. First, it attacks by shooting two or three cannon balls shot from its roof, fired three or four times, though they can be avoided by staying close to the beast. Then it will spit out a rock from its mouth which will bounce on the ground, and must be avoided by ducking. Shoot at the eyes of the beast only as it will only be damaged through them.