WASD or arrows : move Mouse down : mine 1st upgrade : wood, price : 0 $C, mining time : 10 sec 2nd : stone, price : 50 $C, mining time : 8 sec 3rd : iron, price : 150 $C, mining time : 7 sec 4th : gold, price : 300 $C, mining time : 5 sec 5th : _, price : _$C, mining time : 4.5 sec Discover the rest by yourself ! !beta version : bug! Version : beta 0.5
