Yo! Artist for the submission here, this style of graphics is actually super quick to make! First block it out in blender, I used the ocean modifier for the gravy sea. Dumb down the export resolution, then import into Aseprite. Aseprite has a really cool function for indexing the colors, so all you have to do is load ur palette, then go to sprite -> color mode -> more options and you can choose the level of dithering.
The art style is one of my faves, so thanks for your interest! Hope you have a good one :)