Wait for the Puromis to pass, or use Space Jump or Spring Ball to pass through them safely.

Entrance condition:

{
  "comeInNormally": {}
}

Requires:

{
  "haveBlueSuit": {}
}
{
  "or": [
    {
      "and": [
        "SpaceJump",
        {
          "heatFrames": 635
        }
      ]
    },
    {
      "and": [
        "h_useSpringBall",
        {
          "heatFrames": 700
        },
        {
          "acidFrames": 40
        }
      ]
    },
    {
      "and": [
        "h_useSpringBall",
        "canSpringFling",
        "canInsaneJump",
        {
          "heatFrames": 700
        }
      ]
    },
    {
      "and": [
        {
          "heatFrames": 790
        },
        {
          "acidFrames": 80
        }
      ]
    }
  ]
}

Unlocks doors:

{"types":["missiles"],"requires":[{"heatFrames":30}]}
{"types":["super"],"requires":[]}
{"types":["powerbomb"],"requires":[{"heatFrames":60}]}

Dev note: It is possible to land on the Puromis without taking damage, but it's unclear if this can be done reliably.