This level is very simple and you shouldnt have any problem completing with out dying with or with out cheats.
To make life a little easier couple this cheevo with the coop cheevo
Now have the secondary player do most of the work while you take it easy at the rear.
Some areas to avoid are the top of walls where there are some flags because if you fall off the other side you die.
Avoid the water too because if you go too deep you will be eaten by a shark altho that will net you the below cheevo but obviously ruin the whole not dying part.