Toyward fireworks: field recordings, CC0 1.0 Universal.
https://creativecommons.org/publicdomain/zero/1.0/

burst-near.mp3
  single firework.wav — johnnyguitar01
  https://freesound.org/people/johnnyguitar01/sounds/422079/
  HQ source: https://cdn.freesound.org/previews/422/422079_4844309-hq.mp3
  Outdoor firework display in Cranleigh, UK. Full 2.896-second recording.

burst-open.mp3
  Single Firework — richwise
  https://freesound.org/people/richwise/sounds/455453/
  HQ source: https://cdn.freesound.org/previews/455/455453_1481531-hq.mp3
  Southampton, UK, New Year's Eve 2018. Extract from 3.568 to 8.068 seconds.

burst-crisp.mp3 and launch.mp3
  Whistle and Explosion Single_Firework — Rudmer_Rotteveel
  https://freesound.org/people/Rudmer_Rotteveel/sounds/336008/
  HQ source: https://cdn.freesound.org/previews/336/336008_4921277-hq.mp3
  Tascam DR-05 field recording. Whistle (0–1.11 seconds) and separate
  explosion (1.146–2.391 seconds), aligned to the game's launch/burst events.

crackle.mp3
  Firework Crackle — LukaCafuka
  https://freesound.org/people/LukaCafuka/sounds/750682/
  HQ source: https://cdn.freesound.org/previews/750/750682_16236894-hq.mp3
  Firework crackling recorded before New Year 2019. Full 1.674-second recording.

Adaptations: trimming, peak normalisation, a short end fade, stereo MP3 encoding.
Prepared by scripts/prepare-fireworks.py. No pitched synthetic drum is mixed in.