There's a new game called Idle Goo which is yet another blatant ripoff of AdVenture Capitalist (imitation is the sincerest form of flattery). Anyway, their # building selector (x1, x10, x100) is awesome. You guys should totes implement a similar solution. Basically, it rounds to the nearest 10 or 100 and won't let you build until it's possible to build that many.
I'd like to see the BUY buttons styled so that you can see at a glance whether or not you can afford it with the x1, x10, or x100 button you have selected at the moment. It would also be nice to have an x25 button for the Newspaper Delivery.