Thank you for the feedback.
Yes, save system will be my next priority.
The game still lacks information. I'll implement ingame a tutorial and more info for each content later.
Yes, each zone gives bonuses. I've written down the depth of each zone in my last devlog. Shadowrim reaches until 2000 m: kasurigan.itch.io/abyss-idle-miner/devlog/414817/technology-and-geology-update-111x#zones
I've already noticed the inefficiency of the machines. I'm also not satisfied yet how I calculated the randomness. But it is going in the right direction. The coding for that part becomes more systematic.
You're right. The game demands constant attention from the players. That shouldn't be...
It should be "inventory" instead of "inventar". My german slipped there. Sorry :D