Here's the back leg bent out to the side, the front straighter for better balance. The contact's not quite there, but it's still attempting to follow the terrain
And again! If you compare this to the previous shot you'll see the difference! Look at how those legs are keeping in contact with two different height levels!
LOOK AGAIN
Look at the pose! Look at those knees bending! See this 1993 sprite actually adapt to the environment and do its best to stay in natural contact!