It's just one flat plain with one enemy to attack after another. Sure, there's the occasional new challenge like the spiked gate you must get through, but the game does get kind of repetitive after awhile. At least the fight system is somewhat cool. Each enemy has slightly different fighting styles, and you can tell them apart by their stylish hats. The farther you get, the tougher the dudes.
Control is quite difficult to get used to at first.
You can only move left to right, but by default you are in your fighting stance. Moving while in your fighting stance is incredibly slow, and unless you want to fight hundreds of mutant smurfs, you'll want to run towards your destination whenever you have the chance. While running is a great way to travel fast, you're incredibly vunerable while jogging along. So vunerable, in fact, that an enemy can easily kill you with one well-placed cheap shot. To run, stand up by pushing up and then push your joystick to the upper right.