Yeah, definitely a lot of time for the art so there weren't many possibilities for expansion. If we had more experience we could have done a lot more with animations instead of just static objects... next time! THe only easy thing was a lot of text options for each character, so we went in that direction.
As for difficulty, we talked a lot about adding other mechanics, but in the end we decided they didn't add anything. We didn't want people distracted with failing a jump (look at the art instead!), or even just to add that tension. If you think of any suggestions though let us know!