Ninja Puzzle

You're a good ninja. You're on a secret mission. You need to throw darts at the enemy, destroy all enemies, and then go to the next level.

Before you throw darts, you need to use your intelligence, design the route of darts, throw fewer knives and destroy more enemies. Or use a flying knife to cut down objects and make them explode, creating a chain reaction and killing the enemy.

No matter what the situation, just remember to count your steps!