It would be nice if the unlocks for "$/sec" were available for the lower-level generators first, because their generations bars max out first. It'd also be nice if for the higher-level items where the "$/sec" tab is unlocked, if they actually generated that much rather than it being an average of the cash they produce over their entire time. For example, 140 oil wells displaying "$140.xxx trillion/sec" means NOTHING to me as it's not actually generating that amount; it's only the average.
I can live with the physics engine. What's absolutely maddening is that all the troops can be destroyed or plunging to their doom, and the arbitrary timer runs out, thus robbing you of mission credit. Remove the timer. Please.
 "AdVenture Capitalist"){kind=icon}
 "Picma Squared"){kind=icon}
 "Bridge Tactics"){kind=icon}