Concentration, A level set inside an abandoned factory where machines slowly turn on as you progress, making the gameplay harder.
Brainstorming, I asked my friends for level ideas, and they suggested a level where the level slowly floods with water, changing the gameplay.
SCAMPER, I moved the hardest obstacles to the start of the level and the easier parts to the end. Usually, levels are the opposite, with the easy parts first and the hard parts last, so this makes the level feel different.
Ramsey, I researched the word star and learned about supernova, which are explosions of stars. My idea is to make the level start simple, then explode with fast and chaotic gameplay at the end.
https://spaceplace.nasa.gov/supernova/en/
Learn more about these exploding stars!