Sceelix is a software for automating 2D/3D content creation using algorithms, rules, and mathematical models, a practice called procedural generation.
Nothing! Sceelix is now free and open-source.
Sceelix is available for Windows, Mac and Linux.
No. Sceelix is a tool for producing 2D/3D content, which can (among other things) be used in game development. Think of it as something closer to software like Blender, Sketchup, Inkscape or even Paint.
Yes, it is.
Please check the documentation section on Logging and Troubleshooting to get a better understanding of what the problem might be. Make sure you have the necessary dependencies installed, such as .NET Framework 4.6.1 or above (for Windows) and Mono 6 or above (for Mac and Linux). If everything else fails, you can should check the discussions for possible solutions or post a new question yourself.