I think he'll be ok. Right now he is only selling to the early adopter crowd who doesn't mind the crappy graphics. Once he spends some money on graphic designers, he'll be able to get mainstream appeal.

Once he has mainstream appeal, he can release it for the stores to sell. Which will boost his sales.

But yeah...either way he has already made a ton of money off this game....at least a couple million. Which should give him plenty of room to perfect his product.