Quickly shoot to break the shot block and then do a momentumConservingTurnaround to ascend into the little region. Another movement item will be needed to get closer to the crumble blocks.

Entrance condition:

{
  "comeInJumping": {
    "speedBooster": "any",
    "minTiles": 2
  }
}

Requires:

"canTrickyJump"
"canCrossRoomJumpIntoWater"
"canMomentumConservingTurnaround"
{
  "or": [
    "canUseFrozenEnemies",
    "canSpringBallJumpMidAir",
    "HiJump"
  ]
}
{
  "noFlashSuit": {}
}

Dev note: The transition likely connects to Pants Room making this strat not likely to be useful. In any case, each option (Ice, Spring Ball, Hi-Jump) has an alternative in-room strat that can get up without needing a runway. FIXME: this can be done with 1 tile of runway, but it's a bit more difficult. FIXME: with a momentum-conserving morph, it is possible to reach the platforms below the crumble blocks.