Stuck!!! – Space Legends: At the Edge of the Universe (Full) Review

I'm stuck. I can't seem to get all the sword pieces. I know the last one I need is embedded in a wall, but I don't know how to get it out. The chisel and hammer do not seem to work on it. Anyone else have this problem?
Review by P. I. on Space Legends: At the Edge of the Universe (Full).