It is fun!
I have however experienced a bug during the second level boss that seems to be a fairly common occurrence. Hörberg Productions (the creator of Gunman Clive) has issued a forum post saying that they'll be releasing a patch sometime after the holidays in 2013. The current pre-patch fix is to have the 3D turned off during the boss fight then set back to normal after the boss. I don't even care I like the game so much.
In the game you can chose to play as either Clive or Ms. Johnson. As Clive, you're trying to save Ms. Johnson and as Ms. Johnson, you're trying to save Clive who is kidnapped in the exact same way/animation. The only difference (that I've experienced) is that Ms. Johnson can float as she descends, similar to Princess Toadstool in Super Mario Bros. 2. Even the ruffles on Ms. Jonson's dress flutter while she's descending. It's a nice little touch.
The graphics are very brown, as almost everything is in this game. It also has a sketch look that adds some kind of charm. I think it does anyway. I've linked the trailer below (again), because really, really like this game. Even more so because it was only $1.99, but that's not the only reason. The game play is simple: Jump w/ B, Shoot w/ Y, Move w/ either the directional pad or the joystick.
Like Contra, there are a number of powered up guns you can collect. Apart from your single shot pistol, there's a scatter shot gun; there's a "heat" seeking bullet; and lastly (at least through the 2nd level anyway), there's a large slow moving large bullet that does extra damage against the enemies.
I guess I should talk briefly about the enemies. There are your standard thugs who shoot at you from the ground, windows and blue colored trap doors and all take only one hit to kill. At times they ride horses at you and sadly, your only defense is to shoot the horse so it jumps over you then stumbles and presumably dies. Okay, I lied. You can simply duck and the horse and rider will jump over you, but where's the fun in that? There are also wolves that charge you, pelicans that drop bombs, jumping rabbits and a duck. Maybe the duck is a cultural thing? Maybe they're like the monkeys in Time Splitters?
The music is very nice too. There's a western flare to it that doesn't come across as unintentionally hokey. Think of the music in Blazing Saddles. It knows the genre and what our expectations for a western/cowboy world are and it delivers and all the music I've come across has been catchy. Kudos to Arne Hörberg for his compositions.
So if you have a 3DS (it's also available on Android and Apple iOS), I highly (highly) recommend Gunman Clive.
I Can Still Feel My Toes