Those actually look pretty good! Do you have any other sprites in that style? If we could get all the sprites necessary for the platformer game in that kind of style it could work pretty well. It did get a bit messy the smaller ones, but if we use the bigger ones this could work
Btw, I took the liberty of creating a forum on InvisionFree for OWIFG - I've sent everyone on the list a PM with the details. I hope I didn't miss anyone!