Rhythm Game Puzzle

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Across
  1. 4. Mashing wachine.
  2. 8. Literally the premiere chat spams "DJ!"
  3. 9. Why this song has a lot of cross hands?
  4. 12. Another best girl?! That band anime/game, go ahead.
  5. 14. HEART TO HEART-
  6. 16. Rush rush...
  7. 17. How can you flick mid-air?
  8. 18. Really t+pazolite...?
  9. 19. It's that game (Clue: Flick mid-air to see the answer), but on mobile
Down
  1. 1. That one song with both Lv.29 difficulty.
  2. 2. Another best girl. Probably on the one with the DJ stuff or something. *shrug*
  3. 3. Motto choudai (x4)
  4. 5. Bushimo. Kurafutoeggu.
  5. 6. *insert disc scratching noises*
  6. 7. That one game with a sky input.
  7. 10. Hehe, the best girl from another rhythm game (Clue: Sky input) of the one who created this crossword puzzle.
  8. 11. 6 keys, a lever. What could go wrong?
  9. 13. EEEEEEEEEH
  10. 15. Vibe mode activate.