That's an pretty good game for the first one in Godot!
I would only say some advices:
-Next time try to leave the camera less "stuck" in Godot theres an setting for it in the camera node!
-I would recommend you to the next game, search for an pallete, for example in my game i used one called: "Velvet Cherry GB", wich is available in lospec.com!
Putting that aside i enjoyed the game! Hope to see more next jam!