Scribblenauts games reward you for being a bit more creative, they give some kind of achievements stamps for using new words each time and for having some theme around it i think.
You might want to go for them.
It's similar too Epic Yarn i guess. You can play it through, not have fun and then whine how easy it is on forums.
Or you can go for completion and then game suddenly becomes hard.
Oh, and by the way:
Shibata, release the damn game in PAL.
Shibata
Shibata pls