1. A system comprising: an illuminator configured to emit a predetermined pattern of light into an interactive space; a camera configured to detect at least a portion of the predetermined pattern of light within the interactive space; and a game device configured to generate interest data for an object located within the interactive space based on the detected at least a portion of the predetermined pattern of light, wherein the interest data indicates the object's level of interest in a game, wherein the game device is configured to adjust a difficulty level of the game in response to the object's level of interest.