Oh, wow! That's a huge amount of progress - I think I've managed to find all the creatures, though might have done it in an unintended order. I got the bear's column-pushing ability last, so although I can push columns there's nothing left that it would help me reach.
Obviously at this point I know what I'm looking for anyway, but the current version does strike me as being more readable. I'm still having trouble telling the difference between stone and water in the area where the unicorn is lying, but that doesn't seem to cause any knock-on problems.