It's not like the game is very bad, it just could've been MUCH better.
The sound, where maybe not of the greatest quality, but sets a good Wild-West mood. Explosions and gunfire sounded also good. The only turn down was the main character's cheesy accent.
Graphics aren't that good. They seem dated and could have used a bit more color...
Gameplay..... This is where the game is most disappointing. Again, it not bad, it is a pretty fum run-and-gun first person shooter (kinda reminds of Doom in 3d). You get to choose you weapons: one for each kind, a pistol, a rifle and a shotgun. You also get to play a little game of poker to increase (or lose) your ammo. Then it goes bleak. You run through the level killing endless number of foes until you get to the boss. Boss battle are different from one another, but still not very interesting. The game offers nice moments, like riding a horse through the level, but again it's not in it's full potential. And the only puzzles the game offers are little searches of where to go next... Oh, about the difficulty. it's very easy on the easy level, as the enemies die from a single shot, but punishing already on the medium level, as the enemies become sharpshooters.
So if you like Wild-West and want some fast and pretty mindless fun you might wanna check it out. If you want depth look some where else.