Marble Run Building Blocks

Marble Run Building Blocks is a free puzzle game that lets you design and test marble runs using 17 block types and 8 colors. Build with sliders, explore creative arrangements, and view your work from every angle with easy rotate and zoom controls. Saves are automatic, so you can experiment without losing progress.

Features include auto-saving up to 3 designs, undoing mistakes, stacking up to 5 blocks for ambitious builds, and a fun destruction mode to explode everything when you are done. Best of all, there are no in-app purchases - the full experience is free.