Add dedicated sound effects

  + Beefy bullet sound
  + Grenade throw
  + Grenade explosion
  + Impact sounds on enemies
  + Impact sounds on other materials
  + Enemy death (special impact sound, as in e.g. Zelda BoTW?)
  + Cloud puff (enemy death particles)
  + Player step sounds
    + Soil
    + Grass
    + Metal (for jump pads)
  + Player jump
  + Player land