Thanks for testing it out and providing feedback!
Level 0 doesn't generate anything. I'll look into a notification that tells you to level it up once if you try to spin it without buying one. (There's a new help system on each screen too, so that might alleviate this concern.)
The network scans don't actually generate anything unless there are other tasks on the clock, so a full screen of network scans would be pointless. Some experimenting with different combinations should find the optimal balance between sleep, network scan, and income generating tasks
The batteries get used up by any computer part that is refreshing. This was done to give players a bit of leeway when swapping screens. As long as you have batteries charging, you can buy yourself a bit of time to manage the other screens. The new help system explains this as well.
Thanks again for testing and getting back to us, we look forward to hearing from you again!