There are 108 tiles. Each tile depicts an icon, a letter or diphthong. Tiles have been color-coded into four different types. Players draw two tiles from each set randomly. Each player, in turn, tries to make a sentence or phrase using the tiles in their hand and intersecting those tiles already on the 15 by 15 game board. The tiles are used to make "Rebus" words or sentences (similar to using the letter tiles in Scrabble to make words) which are placed on the squares of the 15x15 grid game board. A Rebus is a word or sentence where a symbol replaces part of the word or sentence. For example: if you laid a tile with a picture of a letter "S" followed by a tile with a picture of an "oar" (from a rowboat) the the Rebus would read: "sore". The rule book comes with a description of each tile (in case you didn't know just what the picture is) as well as an example of use for each tile. These descriptions come in very handy when playing the game both for stopping player arguments as well as helping out stumped players. Players score three points for each tile used. Premium squares give players bonuses. Using all eight tiles held scores a fifty point bonus. Highest score wins.