Hmmm, Nvidia says the 6200 has shader model 3.0. Is that not the case?
The 6200 meets the requirements, it's just runs slow for some reason. Other games like Minecraft, Terraria and a host of other games run just fine. It may just be an optimization issue? Don't really know.
It could just be a slow card, or perhaps the game has a shader the card can't handle well. Ah well, I hope you have another way to play it in the near future as it's a great game.
(btw, I can't run it fullscreen on my crappy intel GPU...has to be pretty low-resolution for me to get full framerate. still very enjoyable however)