A fourth mode has been added to Hexic 2 - Battle mode. Here you share a well with an opponent (online or offline) and race to create the most gem clusters. As you earn points, you also earn the right to use the various weapons displayed at the top of the screen. Drop bombs on your opponent, freeze his gems, squeeze his playfield, and more. It adds an extra bit of longevity to a game that is otherwise frighteningly close to "rehash" territory.
800 feels like a lot to pay for the sequel to a game that was free with your system, but hey, you can't complain that you aren't getting a lot of content for the cost. Just as long as you already loved the original game.