When I was eleven years old, it was a very good year, and I can remember my daily routine vividly. These were the years before I owned a Sony Playstation, and I used to venture to my friends house - everyday after school - to watch him play through Final...
Don't kill your Deadlings if you don't have to - they're pretty valuable.
Don't forget you can switch to different creatures on the fly. This is handy for switch pushing.
If there's an obstacle blocking your way, cut it out.