If you play online try not to be a jerk because the game will label you as a bad mannered player. This adds a manner mark to your status screen and bans you from Culdcept’s leaderboards.
Culdecept also has local wireless matches where players exchange cards at the end and a story mode where you can unlock new cards. Want to build your deck faster? Go to the market where you can trade three cards in your hand for two new ones.