OK. I didn't reset my game so I don't know if the lumber reaching infinity issue has been fixed.
I noticed that you made most of the numbers consistently units, k, mil, but bil mght be a useful addition as 10 Energy Multiplier costs over 2 bil for me. Maybe even ditch Mil and Bil for M and B. Most gamers understand the abbreviation. I would also suggest less (if any) decimal places. My Energy Multiplier actually costs 2496.917545 mil. 2497 would be fine in my humble opinion! Also, the Total Energy Per Sec hasn't been changed to mil and still shows as k despite being in the mils.
Soldiers have the same issue that you can keep buying them after they are maxed. It would be nice if the new limit of 20 could not be exceeded.
I know that I should play it from the beginning, but it's hard to throw away my 20 mil energy per sec without potions.
I find that the things I do in the first minute or so of playing are saved. So I log on, upgrade as much as I can and then leave. I return and do the same, over and over until I have spent all my energy. I have got into the habit of getting some idle gains by switching tabs before closing the tab. I don't know if it helps, but I do it anyway.
I just paid more attention to your dev name lol. That's what she typo'd.