Lots of blocking decorations were not there... pretty much all of the chairs and tables, and flower pots in the first level, and all sorts of stuff in the second level including those rows of boxes? that hold in the two fuzzy pistol guys on either side of the hallway. I took a screenshot but forgot to include it ^.^
Yeah, rotations make spriting 8 times harder :P In Doom (and maybe Wolf3d I'm not sure) they used a trick where some rotations could be mirrored, just to cut down on spriting time.
One other random thing I just remembered, I felt that the enemies blocking during death animation was a bit long. It is minor but if you could run past them a little sooner I think it would improve the flow