The problem above happens when there are stacked bills, or bundled bills.
If you don't buy the bundled bills upgrade, you can progress much faster as the bug stops occuring.
But that is the problem:
- either bundled bills
- or leaving the table alone so the bills stack...
both of these things cause the bug to happen.
I could advance to the 5$ bill but higher than that it's very difficult right now.




Maybe there is a bug here, I can't tell exactly: the iron cost to reduce the tick interval for Energy Amp skyrocketed at some point where now it's just unattainable. Compared to the Speed Boost reduce tick interval upgrade cost, it just feels like it doesn't have the same cost progression.




