Yes, the main idea is not new, but it still works here, and it has been implemented correctly on a technical level, which is already a good foundation. I think most of us would agree that the game is too short and does not offer much challenge.
What seems worth exploring now is what kind of puzzle design can be built around this mechanic that is already in place: how it can be used beyond a linear level structure, how it can become part of logic and reasoning, and how the player can be meaningfully challenged. To me, these are exactly the questions the developer should ask if they want to keep developing the game.