Sonic Princess

During nighttime, the terrain of the Earth is susceptible to inexplicable changes. Human beings called these strange occurrences the Phantom Phenomenon. Soon, with the power of technology and magic, they learned that threat is lurking in the depths of our planet. The underground city Ge-Pang was built to avert it. One day, a SOS alarm sounds in the city. Leila Reifido, who possesses the magical power of levitation as well as technological skills, sets out to counter an unprecedented robotic assault.

[From Mobygames]