"Maniacal laughter" refers to a type of laughter that is wild, frenzied, and crazy. It is often associated with someone who is mentally unstable, evil, or up to no good. Full definition
The graphics in the game are high contrast and alive with colour, with each slots game complimented by its own sound effects that you will find are equal parts hypnotizing and entertaining (as long as you tend to enjoy maniacal laughter, and the sound of bells and some sort of twinkling). (goodereader.com)