Once the max button for junkmobiles means buying 100's or more levels a click. The script crashes.
Well runs so slowly that you may as well reload the page
First buildings and research are far too slow to complete.
Gems required to speed up build times less than 5mins. is ridiculous.
Hadn't even researched mining before I got bored and left. 1/5
3/5 not original but works well. Kudos for doing it in HTML5. Angry Birds is a rip off of the 500 knock things over with a pixelated projectile games that came before it.
It appears a little later on as one of the upgrades. For the second settlement you have to look to other means to gather coin! ;)