humn... Ranged skeleton should be fast to add, I'll see what I can do tonight as I finished the art for the crafts pack.
There are already orcs as a "playable" race that you could use, but I can add some goblins.
The troll and the spider should take a bit longer to develop, but I'll see what I can do.
I'm adding more traps (floor traps) to the mix btw, and then I'll move to ceiling traps and elemetal traps (ice, flames, poison, etc).