Starting out with castle
An ogre on a bridge
Falling down after hitting an obstacle.
Shield picked up
Watch out for that boulder.
A shield allows our ninja to rush through an obstacle.
Reaching a high score.
Start of pirate level
The pirate level has pirates (yes, really)...
Watch out for the cannon ball.
Activating a power-up after knocking out three enemies of a kind.
Start of jungle level
A snake and some other creature
Some kind of poisonous frogs
Shields can be bought as IAP.