Puzzles Puzzle

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Across
  1. 5. Quick Understanding of Block Extrusion
  2. 6. Uncover it or flag it?
  3. 10. Not much to it. Find the word.
  4. 11. also known as a cipher
  5. 12. Deduction
  6. 14. Demonic galloping dominoes
  7. 17. Called "Cross Sums" in English
  8. 19. Don't run them off a cliff
  9. 20. Rearrange letters to solve clue with picture
Down
  1. 1. 1997 running on cubes for PlayStation
  2. 2. 1-9 in each row, column, and subgrid
  3. 3. You're doing one right now
  4. 4. Blocks and bitchin' Russian music
  5. 7. Gooey bridge making
  6. 8. "The Cake Is A Lie"
  7. 9. 1994 origin of Candy Crush
  8. 13. Tetrahedron Rubik's Cube
  9. 15. 1993 island puzzle game for PC
  10. 16. Some assembly required
  11. 18. nefriended is a friend in need