It's a really cool proof of concept and I can totally see this being expanded on, beautiful art as well especially the space background! I noticed sometimes the character has a line artifact that flickers above it, I saw a comment on a previous game about using the canvas_item's stretch mode that seemed like it solved a similar problem. Here's the comment page: https://itch.io/jam/godot-wild-jam-93/rate/4581300?before=2#comments
Hope that helps, nice work overall!