Push works well. Something like this inside the Sketchy Physics UI for the object.
xpos=0.0 ypos=0.0 xturn=150.0 yturn=150.0 ontick{ if frame%60 == 0 if xpos < xturn || ypos > yturn push([1,0,0]) puts ("pushx") else push([0,2,0]) puts ("pushy") end xpos=position().x ypos=position().y puts(ypos) end }This will push towards the x direction for awhile then push towards the y and then back to the x. You could also change the logic so the push direction changed based on touching the bumpers using the ontouch event.