click the donut click test cps to test your cps Note: only start clicking in the cps test after the start disappears. cps test goes for 20 secs. If you get above 6.6 cps then you will get 5 cookies, which you can use to buy OP upgrades. tab on the top right is for the shop and you can buy upgrades from the shop
there are 10 upgrades in the shop green numbers are the amount of donuts, brown numbers are the number of cookies, small red numbers are the number of donuts per second enjoy the waterfall of donuts :)
