Idea: an easy layout, but it will be 2 hours long, 2.1 glow style mixed with 2.2 pixel style. Theme - neon. With a slow chill song. A 2 hour level may be diffrent from many other easy levels
Sedondary ideas:
Must have: this layout would be super smooth, with smooth camera effects and move triggers
Maybe : a fast-paced ufo and Swing (the hardest part)
Low chance: some memory-styled details, like first practice alot, then play
Never: the level wont be fast paced in other gamemodes than ufo and swing, because easy levels almost never are, in fact, there are very few fast-paced easy levels
Tradeoff: i would 100% choose optimisation and time. In layouts, quality almost doesnt matter, optimisation and time both are keys to win, because both of them are needed for a 2 hour layout