I really liked the art of space in the game, the planets look cool, for some reason I remembered Dune 2 (Sega Megadrive). The character is also very funny, and the different gravity on the planets is a good move :)
Advice from an interface developer - if something looks like a button, then it needs to behave like a button :)
It would also be nice to add a coyote jump for the character, you can use plugins in Godot, for example PlatformerController2D (good for prototypes, or you can just look at the implementation and repeat it)
And thanks for supporting the controller in your game, I connected it and enjoyed it!