It's nice to see another godot developer, there doesn't seem to be a lot of us here.
Really fun, intuitive game. All I think it's missing mechanically is a way to check where you're falling, like maybe an ability to look down a certain distance to check for platforms while making the player more vulnerable in the process.
I really like the idea of enemies attacking by pushing you a significant distance in a game based around fall damage. I think it would be worth experimenting with that being their main mode of attack rather than having them damage the player directly.
Also, your pause menu doesn't seem to actually pause the game, this isn't a big issue and didn't affect my rating, but I strongly recommend this tutorial, as it's how I learned to pause godot games, and the system I used in my entry.