i know it's tempting to cheat and go into 'God' mode i've done it in other games and ended up spoiling the flow of the game.
try this following a walk through instead go to :_
on the Left hand side are some menus/links - look under DATABASE - there is the EF walkthrough.
this has pictures and written notes to take you through each level.
This is a very good walkthrough. It also gives some commands that you cant find elsewhere.