Determining if a word is positive or negative from a blank input is a much more difficult task, computing-wise, than having the player select one of two options. However, as a player, I didn't feel that blank input was any more fun than choosing between two options (especially since the result, to my knowledge, is positive or negative). I think the technology behind the game is interesting, but it needs a better-designed game to show its possibilities. Maybe the engine's mastermind could collaborate with a writer... ?