As far as shadows go, I'd rather not include them in this tileset because alpha transparency breaks NES restrictions and as Shane said, creating tiles specifically for shadows would increase the complexity of the tileset. On the other hand, if you really wanted to add shadows, there's nothing stopping you from taking the full-black tile and plopping it down in an upper layer like so...
Also note that I've fixed the houses! As Linkus said, the doors were out-of-proportion so I lowered the ceilings to improve the proportions. I won't be enlarging the doors, though, because it's necessary that they are 16x16. That way, I can set up doors as newbie-friendly armos tiles that you can bump into to open without messing with screen secrets or anything like that.
And as for the cliffs, I'll be going back and making those a little more like the ones in Koten Basic. I think the dungeon screen is just fine, though. Once I add in doors the perspective will seem a less confusing for those not familiar with old-school RPGs.
Edited by DragonDePlatino, 02 September 2014 - 01:00 PM.