Click the options on the left to turn functions on and off. Red means activated, gold means deactivated. Select the pickaxe to dig, bucket to fill and hammer to build. Click or drag to dig, hold to build. Take care as you cannot dig out filled squares more than once! Please click Finish to save your scores!
Credit to @Psiborg and @daemys for shortening the cloning script. If you liked it, click the heart button! NB only activate one icon at a time or it won't work. Update 25/12/15: Digging is instant Update 26/12/15: Rating system fixed Update 1/1/16: Bug with digging fixed