Obstacles:

Dangerously Stupid Box is an obstacle in the game which players have to jump over and avoid getting hit or else they will die from the blade on top of his head.

Depressed coin is an obstacle to avoid. If the player touches it, you will lose currency (maybe 50% of their currency).

The ladder of course makes the player move up or down.
Rewards:

Sword is an item to collect which allows the player to attack enemies.

Happy Coins are collectables which are used to buy items at shops.

Angry shield is an item which protects the player from enemy damage.