Should have been in the description, but yeah, at 35 meters it's deemed "too far away". I entend to create a "research center" where you can unlock features as you progress into the game. Drilling deeper, better understanding of the ore body, gears or vehicles that don't break/get consumed as easily, etc.
In the future, I also intend to add inclined drifts allowing you to add up to +- 10 meters on your level, as well as secondary down ramps.
A saving feature is something that will be adressed soon yes! I was waiting until the features were more "locked in" but right now I think it's a good time to implement it. The auto-save could be done between each shift.
As for the backfilled stopes, when testing the hotfix yesterday, I noticed it worked just fine actually, I could drive on top of the backfill without any issue. Did you encounter the bug on your last game?
I'm sorry for the lack of tutorial. The gameplay features aren't completely fleshed out yet, so tutorials are hard to maintain. The game is still in development.
I intend to realease a pretty big update in the next few months, which also includes a complete graphics/UI refresh. A small tutorial will be included in this update!
