Birthday

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Across
  1. 2. The mountain associated with Greek gods
  2. 5. Something that tricks the senses
  3. 9. The central character in a story.
  4. 11. The famous ancient arena in Rome.
  5. 12. The Japanese art of paper folding
  6. 14. Valuable objects or hidden riches.
  7. 15. A structure built to commemorate someone or something.
  8. 17. A block-building sandbox video game.
  9. 19. A space rock burning in Earth's atmosphere.
  10. 20. A structure with triangular sides.
  11. 21. An imitation of a real-world process.
Down
  1. 1. An intense preoccupation with something.
  2. 3. A market controlled by a single seller.
  3. 4. A seemingly contradictory statement
  4. 6. A comedy series with recurring characters
  5. 7. A winning position in chess
  6. 8. Relating to the smallest units in physics
  7. 10. Finding something wonderful by chance.
  8. 13. A step-by-step procedure for solving a problem.
  9. 16. A sentimental longing for the past.
  10. 18. Japanese animation.