Concentration - I was thinking of making a level based off a specific color, such as if I were to base it off something like the color blue, I would not only make it blue, but I would also only use blue gameplay items.
Brainstorming - My friends didn't help me out here, but my idea was gravity pushing you down on a gas giant like Jupiter, Saturn, Uranus, or Neptune.
SCAMPER - Deadlocked, but it's impossible?
Every time you die to something impossible in this level, that something changes to be possible, and you would keep dying to these things somewhere in the level until the level becomes possible.
Ramsey Method - I was thinking about making a level about a red giant/white dwarf, where in the middle of the level, you go into the core of the red giant (a.k.a the white dwarf), and the level ends by reaching the center of the red giant.
https://science.nasa.gov/universe/stars/types/#white-dwarfs