good
but as other people have said, it needs a far larger word data-base, and like other people have said a game needs to offer all of its content upfront. if you want to sell your game put a timer or level limit on it- perhaps a quarter of the actual game-play is available to anyone who doesn't plop down five dollars or whatever you want to price your game.
If you are selling your game, make sure it is one which the price you wish to sell it for is a price that other people are willing to pay- I would not pay 20$ for the full version of this. Might pay a max of five dollars.