Touch Master is low on thrills but it does have some uncommonly innovative mini games along with some more traditional games and is overall well put together. Most of these games are very similar to larger touch-screen games found in casinos or bars, etc. A mixture of card games, gem based games, and word/trivia games.
Not a single one of the games would really stand-alone well on their own, but with 23 games in one package it's definately worth your money, for a rental, if not for a purchase.
This game or games is a bore. It is a time killer and some games can also be addicting. However, he games in this game can be found on a computer site or cell phone game download. There is nothing really special about the games to make it a DS game. Not many control just the touch screen. I guess that is why they call it "TouchMaster". If you are looking to pass time in the DMV or you are bore and what to stimulate your mind just a spark buy this game. If you are looking for something fun and exciting, find another game.