The layout of the game could be different, but I don't think the rules are covered by any copyright, only the graphic design. It's a very simple game in fact and could be modified a bit as to the number of dice you can reroll and whether you play against another player (simulated by an algorithm) just like in any other card game, or bet on whether you can get a certain "figure" (like in typical dice or roulette).
It would bring some freshness to the game because at the moment most sites offer us the good old PD style dice, which itself is based on satoshidice (correct me if i'm wrong).
It would be a good game but how will the developers make it provably fair?
It's in fact a combination of poker and dice, so if both of these can be made provably fair I see no problem.