The current contrast is the result of careful tweaking and testing — the higher contrast from the earlier iterations hurt the eyes, while lower contrast made the text appear too muddy.

That's a lot of wonderful ideas to write about, so I will be more than happy to share the knowledge.
But I will have to write a lot about those things, so I would do it in new articles.

Some information beforehand - our team consists of 2 people, the game is in development for over 2 years of spare time, and we plan to release it in early June. We are using Unity and developing it for Windows.
There will be Linux and Mac ports, but after the Win version. No plans for mobile platforms for now.

Thank you for your questions, and have a nice day!