Ariva is a game that is rather difficult to describe. The object is to maneuver to the exit, avoiding the various obstructions on each randomly generated level. The trick is that you can only move in straight lines. (See the screenshot to kind of see what I mean.) It's a laid-back and mildly entertaining puzzle game, and randomly generated levels means you'll have a unique challenge each time you play, although the presentation is bare-bones and thus not tremendously engaging.