Oh, Jesus, this is gonna take a while. It is kinda hard to explain over the internet. First, install it. Then (if you have the full version) go to "Missions" on the home screen. Then select "Moogums Diary" and tap "Done." Now select "Meet the Neighbors" and tap "Done." Then you can read the paragraph of funny stuff. After you have done that tap the screen. That brings you to the Moogums Barnyard loading screen. You are the snails with the blue shells. Wait until it is your turn (if it isn't already). The objective of the game is just like Worms, to kill all the snails on the other team. When it is your turn you will be at the Look view. At the very bottom there is a picture of the active snail. You cannot select snails manually. Just to the right of the portrait is a bar showing the name and health of the active snail. To the right of that there are two bars showing the total health of each team. To the right of that there is a wind indicator. Up in the top right corner there is a box that you can tap in to select where you want to view the map. To the left of this box there is a bar with four buttons. The leftmost button is the Menu button and is fairly self-explanatory. The Look button/view I have just explained. To the right of the Look button there is the Move button/view. Click on it. In the bottom right-hand corner there are movement controls. Crawl left/right, small jump left/right, and big jump left/right. The last button in the top bar is the Aim button. Click on it. At the bottom right there is a big red FIRE button. It is fairly obvious to tell what it does. To the left of that there is a small beige bar with a small beige arrow on either side. Tap the bar. This brings up a box that shows the weapons that you have. You can select a weapon by tapping it. It says the weapons name under the box. Now you can tap the screen where the arrow is. Hold the stylus to the screen. Moving the stylus farther from the snail elongates the arrow and thus the power that the weapon is launced at. Moving the arrow in a circle around the snail changes where the arrow is pointing and thus in which direction the weapon will be fired. When aiming take into account the wind as well. The point of doing Missions is to get weapons. Once you have all the weapons you can play Deathmatch or 2-Player. The Options tab at the home screen is fairly self-explanatory. As you play the game more you get better. There are also different amounts of money that you get in Deathmatch and 2-Player.
1 snail = 500 NUSD
2 = 1000
3 = 1500
4 = 2000
5 = 2500
In Deathmatch and 2-Player you get to buy weapons. If you complete all the missions up to the last one you get all the weapons. There are also multiple difficulty levels in Deathmatch. 1-3 difficulty = both teams even. 4 difficulty = opponent has 1 snail more than you. 5 difficulty = 2 snails more than you. On certain levels there are different gravities too.
If you need any help, then just ask. Most of the people in this forum would be willing to help (except for Chriva and MooseMaster, stay away from them)