Let's kick off a discussion about whiteboxing. Probuilder and Polybrush are included in the project, so it should be easy to do it using those. Take the character controller in the project, and whitebox some levels to get a sense of scale, obstacle placement, and verticality. No need to be specific, and don't use external assets as a test. Also, there's no need to open a Pull Request on Github for now. Post screenshots of your work in this thread so we can keep refining using each other's inputs! Whiteboxing cards are in this deck. For the environments, refer to the story within the Game Design deck.