A few variations of walking on your fists and feet (all can be done on ground and wall, facing up or down going forward or backwards)

As always let the breath hold the movement within it and move from the body not from the fist.

1 opposing arm and leg movement
2 Same side arm and leg movement (think of a fist as a step)
3 arm and arm and than leg and leg or the opposite
4 both arms together and than both legs together or the opposite
5 Jumping all limbs at the same time
6  Stiff limbs and only body movement or stiff body and only limb movement

Try it out for a few days and change all the time and than note how your work changes.