Great work! Very smart interpretation of the theme. Honestly, I've seen many games use cloning mechanics over the years, but there's something unique about this game. Maybe it's because it isn't a typical platformer. I also really liked the level design. It felt clean, clever, and thoughtfully put together.
The gameplay was fun, though I didn't beat the game. I found understanding and timing the clones, and figuring out what each clone actually does, a bit confusing at times. Maybe the game could use a bit more guidance, or maybe it's just a skill issue on my side. The shader effect, while visually cool, was honestly a bit disturbing for me and made it harder to keep playing for long periods. The dialogue sound effects could also become a bit annoying after a while, though I appreciated you using dialogue for tips and to elaborate on the ideas behind each level.
One more thing, using Esc as the menu button might not be the best idea for a web build since it exits fullscreen mode.
That said, I still really enjoyed the overall experience. The concept feels fresh, the mechanics are interesting, and the game definitely stands out from other cloning-based games I've played. Great work, and keep it up!