Looking at the examples in there -- what exactly in that is simple to you? It's fully 3D, which is hard as fuck. I learned a lot of skills doing Doom WADs that

Looking at the examples in there -- what exactly in that is simple to you? It's fully 3D, which is hard as fuck. I learned a lot of skills doing Doom WADs that were less close to real coding than what this lets you do (full Javascript API).