With lates update i can run 5 protium cells (almost 6 without 2.5 qi and 10qi upgrades) stable only thing is manually replacing them can be tiring. And again an achievement system can be nice with benefits of course.
Suggestion: Achievements with bonus like %1 cash per second per achievement or so. Or it can be cell specified achievement like unlock Nefastium-%5 nefastium value, buy 100 nefastium- decrease price of Nefastium by 10, accumulate 1Q heat dissipation with Nefastium cell-decrease Nefastium cell heat output by %3-5 . Replace total of 1000-10000 cells increase base value of all cells by %50-100 These are the ones in my mind.
I got more than 8 thousands of building and game lags actually unplayable. Something in code is pushing it. Can't be related to CPU or GPU. 3770 HD 7950 so no way. How can people have 25 k buildings if it is the problem?
You are wrong with healt per level argument. Try to find block that gives you money per second most. For me first one 0.3 per second second 0.6 per second and third block gives 0.9 per second so you can't get as much money as you can get from higher levels.
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Heh:)