Move forward far enough to trigger the crumble block, then quickly moonfall before it respawns. It can help to perform the moonfall facing left (backing up to the right), then quickly turn back left to clear the platform. Press against the wall, aim down, and shoot open the door while falling. It is possible to delay the moonfall enough to land on the doorframe, by turning around back and forth once mid-air.

Requires:

"canMoonfall"
"canTrickyJump"
{
  "simpleHeatFrames": 100
}
{
  "heatFrames": 60
}