The project this was remixed from was unshared. https://scratch.mit.edu/projects/707915924 https://scratch.mit.edu/discuss/topic/613700/ Arrow keys to move. Remixed to show basic slope detection. It's the same sprite-based method @griffpatch used in his ball physics tutorial on YouTube. My implementation is not perfect, non-climbable walls are not detected, however it is a good starting point.