Okay, I SWEAR that the first update made the drones in the narthex/entryway made their trip take 8 seconds instead of 10, but then the second update made them take 9 seconds instead, which made them slower instead of faster! The parish hall is actually faster, though, making me wonder if it's just an oversight. Updating faster drones a 3rd time also made them go back to the drones taking 8 seconds in the entryway. Ignore this, I just misremembered something.
Also, I think the other two upgrades besides faster drones should be made cheaper so that it wouldn't feel like I'm grinding for money. I mean, 500 and 300 coins compared to a mere 50?
One more thing: being able to get into fullscreen without having to go back to the main menu on browser would be nice.