Most levels have enemies in them. They are often able to kill or capture Zack and Wiki, while others are harmless and can be turned into items. Each world ends with a boss level, where the player has to either battle a boss or survive it to beat the level. "Zack & Wiki" has many parts where the player can get a game over. The game does not have a health bar, and falling in a pit of spikes or getting crushed is instant death, and it makes the player have to start the level over unless he or she has a Platinum Ticket.