Run from left to right to gain a shinecharge, then immediately moonfall down the shaft. There is just barely enough time to shoot the door open (if not already open) and spark out.

Requires:

{
  "notable": "Etecoon Shaft Moonfall Spark"
}
{
  "canShineCharge": {
    "usedTiles": 17,
    "openEnd": 0
  }
}
"canMoonfall"
"canShinechargeMovementComplex"
{
  "shinespark": {
    "frames": 12
  }
}

Exit condition:

{
  "leaveWithSpark": {}
}

Unlocks doors:

{"types":["missiles","powerbomb"],"requires":[{"or":["h_canFly","canConsecutiveWalljump"]}]}
{"types":["super"],"requires":[]}