I recently participated in the #badboxart jam over at Gamejolt.
http://jams.gamejolt.io/badboxart
I chose one called Jelly Boy. I think the original was a platformer, but I didn't go that route.
http://gamejolt.com/games/jelli-boi/136000
It's more like a sim kind of game. I like how the graphics turned out, but the game play is a bit blaa.
Not sure but I may develop more out of it.