Dwarves, Game Development and Homemade Engines

Hello everyone! I recently started development on a game i have wanted to make for a long time. Here is the link to the images of my progress: http://imgur.com/gallery/3FNEYp3. The game is inspired by the Lord of the Rings but centers around Dwarves (who, in my opinion are very underrated).It is going to be open world and have varied terrains and environments each with their own unique color scheme. The game is intended to be stylized and have a varied color palate. The work you see in the link was done in around 4 months and was built in Unity. Around March of this year i decided i would rather use my own engine, and started building one based on OpenGL. The engine development is difficult as i started learning C++ starting when i started the engine, but i am making progress.

I would really like to hear feedback and constructive criticism is welcome! If you have any programming experience especially with OpenGL and C++ tell me any advice you have. If you have any engine development experience i would REALLY like to hear from you! if you have any suggestions please tell me!