You could build your games a lot faster if you used Defold or Godot. I made a 3D game in Godot to learn the engine, and it is lightweight and fast.
I make edutainment games, and my current project that I'm working on is built with Defold. Check out my games' profile on itch.
Your understanding of how colors interact is way ahead of me, and it's an area I'm working on.