Projectiles may shoot doodle games off the screen in a straight line or may fall due to gravity depending on the game style you are playing.  
The original, Christmas, Easter, Halloween, the World Cup, the Rainforest, Out of Space, Ice Blizzard, Retro Arcade, Ninja, and Pirate are just a few of the themes that players can pick from. Doodler and his adversaries adapt to the changing theme.
To buy new skins and extra lives for doodle games in the Ninja, Pirate, Halloween, and Easter themes, users must either earn or spend coins.