I haven't been on scratch in a while so... Here's a project! I've tried having a go at making a marble simulation, and I think it turned out OK... Click anywhere on the screen, and a marble will be launched from the bottom of the screen at general direction of the mouse. Collisions were a bit difficult to implement, but I got there eventually!
All code, inspiration and artwork by me, @hydronesium. If you want to use this project for anything (like, maybe, a game or something), feel free, just please give credit.