I really liked the concept of your game, and I don't think that I have ever seen a game with a similar idea as yours. The art was also very pleasant to look at and fit the concept well.
However, you might want to either tune the jumping mechanic to allow the player to jump further or fix the collision masks on the platforms. Unfortunately, I could not make it further than the Ancient Egypt level because the player simply doesn't jump far enough to reach a certain platform. Moreover, once a layer misses a jump and falls to the area between the elevated platforms, it's impossible for them to get out without restarting the game.
I think that your game has a lot of potentials, but the issues I described need to be fixed to allow for a better player experience.