Bolt
Bolt is a free visual scripting tool for Unity3d.
It's a powerful and intuitive way to create game behavior without needing to learn a whole lot of C# programming. Click the image to the left to get a quick overview
Official Bolt Tutorials
Official Bolt Tutorials
These tutorials start you in making a simple 2d platformer in bolt using a framework. Written instructions are included https://learn.unity.com/project/bolt-platformer-tutorial?_ga=2.24017402.1592062709.1610919300-1767016595.1580189278
Please note that some of the instructions are omitted and help is given in the comments section.
Bolt Documentation