A direct port with awesome extras, including WiFi, makes UMK a brand new experience.
Sound/Music: Well who wouldn't enjoy the sounds of screams and grunting and bloodsplats and .. you get the idea. Great sounds, and the music is pretty catchy. Every BGM for each level goes along with the features of the level basically.
Difficulty: This can be altered, however it varies. In the main UMK mode, there are 4 paths you can take. As each level progresses, the enemy gets harder. If you use the fourth path, then obviously it'll be a little harder. Plus, you can change the difficulty in the options so you can make it even more harder.
Gameplay: As I stated before, there are two games in this. Each of them have WiFi capability so you can test your might in your combat and puzzle ways. I, myself, am better at the puzzle one. The main idea is the same as most MK games; the goal is to use the many characters offered to you and fight through a specific number of people before making it to the mini-boss Motoro (traditional Mortal Kombat monster) and then head-to-head with Shao Khan who is the hardest battle in the game. The WiFi quality is pretty good, although it can be laggy.
Controls: Pretty much while you play, all your special moves and fatalities are on the top screen (this can be changed to show on the bottom screen and the fight screen to be on the top in the options). The controls aren't hard to learn; L is run, R is block, X is high-kick, A is low-kick, B is low-punch, and Y is high-punch. The way you'd want a MK game to be like.
Overall: If you like fighting games with a twist of blood n' guts going everywhere, plus a few bones scattering everywhich way, and/or you're into MK games, this is one you'll want to add to your collection, not disappointing at all. The addition of WiFi makes it all the better! There are also several secrets you can unlock such as new characters and so on. Try to find them all..