I had never played jump king, I've been too afraid cuz I'm terrible at any form of precise platforming. But I gave your game a shot and enjoyed what I could get through! For your first game, I think this is a huuuuge accomplishment! Felt incredibly clean. My only bit of critique for myself is just on a couple of small Godot/gameplay-related things:
- Getting a background in would make the assets pop more. If you're looking for something simple to mess with, you could maybe use ColorRect and just have it slowly change color as you get higher up.
- Know the game is 1:1 to jump kind, but I almost wished the camera was just connected to the player. That first bit where you have to guess where the platform is was difficult for myself. Get it's the point of the game, suggestion is more of a personal taste for myself since I'm terrible at platformers lol.
- Would also be cool to see some particles. The CPUParticle node is pretty chill to use and you can customize it to emit when the player is walking or even falling. Like a dust trail or something. Small polish detail. As of right now, art feels a bit flat.
Again, all the suggestions are just minor. Congrats on your first jam!