New Link: https://scratch.mit.edu/projects/824700342/ Basic physics/platforming engine, based off of @griffpatch 's design, with changes to how it works and runs. Press D to enable dev mode to quickly change physics in the project. <----> Editing the Level <----> The player knows it's touching the ground when it's touching the color of the Level (you can change it). I suggest using the backdrop as the hotbox for the levels, and an overlaying level art sprite.
@griffpatch for the basics