Alright, if you can’t make legs you can just, look at some tutorials on robot legs our leave it the way it is. If you think it needs more work done to eat!.
I wouldn’t really say you could give the robot a “more low-poly look”, doesn’t low-poly mean low polygon count? If you mean cartoony, I would recommend adding higher reflectance and giving less detail to the axe and background terrain. The robot itself is spot-on.
You’re smoothing the terrain too much it seems, kind of taking away that cartoony/low-poly feel I understand cartoony and low-poly are different.
Low-poly means low polygon count, so reduce the polygon count.