I read that it is your first atempt in Gdevelop, happy you are giving it a try, it has many great features and if you like Godot, that means you like game development. I am encouraging you play around with Gdevelop to explore all the posibilities. Krita is great, I am using as well Inkscape, great for vector creations, that you can scale how much you want and render it to the assets you need. Btw. Gdevelop has many premade assets, that my help you to prototype your project. Overal it is amazing you managed to submit your game, many people joint, but did not make it to that point. It is brave and I like the idea of your game!