Its been awhile... let me load it up......
Okay.
From what I remember, you have one person select Death Match, then Mutil Snailer, click on start, pick your teams and money etc, then click on done, then select your level, then click done again. It should take you to a screen that says connecting, pleas wait.
Now, the second player can start the game, go into deathmatch, then select multi snailer, you should see the first players name and level in the box to the left (where it says select a game to join), if not, tap the search button a couple times and it should show up*... then once you see it, tap on it and click on start., the game will then connect.
*If the game still does not show up, then you have something wrong with your ad-hoc connection, make sure you are both set to the same channel AND your SSID are both set to the exact same name (anything but the word ANY).
In fact, I just played a pvp game versus my roommate today, so I know it works just fine