At first, you can only play the default quest, "Eternal Quest of the Dark Order". This quest is endless, with treasure chests containing coins at various places. The farther you progress, the more coins each chest will contain. You will also see revive points, which appear as dim purple panels. When stepped on, it will activate. If you die, you will have an option to revive at the last panel that was activated for some coins. The cost of reviving increases with your progress. Instead of reviving, save your coins to purchase other quests.