The real golf pros have a massive advantage, in being able to see and judge the cross slopes, whereas this program only provides for up/down slope. How are we expected to putt with no basis to judge the cross slope?
When putting, try clicking the 4-way arrow on the bottom of the screen to toggle between east-west and north-south dot movements. You can also try clicking the GREEN VIEW button on the screen to see the cross slopes. While in GREEN VIEW, hold your mouse button down to drag the green around to see the slopes from different angles.