I love that idea, and I wish I could put them into the game! I think that would be such a great concept for a platformer game like this.
For the level generation in this one I did individual drawn tilemaps for each level. I hadn't figured out the way to do terrains in Godot yet either so it was just me placing each tile with the painting in the tilemap editor. I created more maps than would be required to reach to end to offer some replay value but I think it can also go bad sometimes if the RNG picks only certain numbers by chance.