As suggestion, can be added Lions, Elephants, Cocodriles, Hounds, Wolfs, etc. To the environment to increase the difficulty or achievements.
It would be nice indeed to have much more variety of vegetation, lusher scenery, more varied animals but without affecting gameplay or balance. Only aesthetics.
I think a more detailed scenery would be nice too, but you’re right about gameplay. I wouldn’t want any new types of animals introduced, but i’m all for improved scenery.
@VEIZIKS said:
It would be nice indeed to have much more variety of vegetation, lusher scenery, more varied animals but without affecting gameplay or balance. Only aesthetics.
Yes aesthetically I would approve.
Lions, and elephants, are already in the game. Crocodiles are called alligators in this game, but that’s another discussion. 
As for scenery, I’d love to see a wider variety on that one.