A short hop from the door can bounce on the crumbles. Just be careful of being pushed back onto the crumble blocks by the spikes.

Requires:

"h_canXMode"
"h_XModeSpikeHit"
"h_XModeSpikeHit"
"canTrickyJump"
"canMidairShinespark"
{
  "canShineCharge": {
    "usedTiles": 33,
    "openEnd": 2
  }
}
{
  "heatFrames": 400
}
{
  "shinespark": {
    "frames": 12,
    "excessFrames": 4
  }
}