I think it would be cool to be able to sell (or get rid of for no money back) units that you do not want anymore. Selling would work for 1/2 of the buying price, or just getting rid of extra units because it's annoying that I accidentally bought too many.
Would rate 5 stars, but going for hours...bug, unfixable (uggggg), try to fix it by reloading page, and I figured out, apparently, if I reload the page, I lose all my progress (which isn't a great feature for an idle game)! Fix that and I will gladly rate this 5 stars!
Plague Inc is better! I wouldn't say that, but even with 0 visibility, government starts working on a cure! How do you cure something invisible? Also, what country's government? Who the hell is working on a cure for the invisible disease?
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Does it happen every time you reload the page? [edit: PM me if you wanna troubleshoot]