Algodoo

Ever wanted to make a platformer of your own but barely had any experience with scripting? Well here is a platformer template! The square needs credit, but the mechanics do not have to have credit. To open script menu, you right-click the object that you want to modify and select Script Menu. There are also secrets scattered across the map, including a very customizable RAINBOW BRICK!

And also, make sure to customize it... have fun!