
Speaking of Ayako, when the ship touches her, she will make random things happen like make the tunnel darker, make the ship go slower or faster, or have the camera shake horizontally, vertically or circularly. She will sometimes give you power-ups like faster shots and even an extra life.
Anyway, the game has 8 levels and you get past them every 1000th frame. Once the frame counter reaches 7998, the game will freeze, preventing you from exiting it.