I don't know how much you've stuck to ref but it looks like you're pushing yourself with the perspective of these poses now. Always cool to see that kind of progress.
Look at putting more variation in your ramps (look up hue-shifting), and either break up the outlines or AA them
The feet and hands kind of look like boxes, try sketching out more positions for the fingers and looking up anatomical reference
I don't know how you're gonna finish/AA the staircase
Try breaking down the wood grain.
All I've got for now, keep on.