give a tank a destination... it moves ANYWHERE but to where you want it... computer can place its tanks in a perfect arc to shoot one of mine with no others attacking them but I can't place tanks with less than 10 lengths precision... no matter how carefully I click. Then when I move a tank it goes in circles around its destination (with NOTHING in the way) getting shot and I can't get it to stop by clicking it and turning it green it just keeps moving. Developer is a moron.
Max gem rate is where you kill the rock with one hit.
Cost of upgrades does get insane... I am now needing to use the date change "glitch" (save, reset to 2099, save, reset to current date, repeat) 10 times (850 years worth of offline cash) in order to get ONE blacksmith upgrade to try for 0.1% better chance of a better pick....