I finished main campaign in 20 hours, getting 2 endings, didn't bother to get all the stars.
Anyway Have fun!

Depending on how quick or meticulous you play, it's around 1-3 hours.
Full game is rated at 20-35h.

Thought you reached towards the end of the game..
Anywho, how long is the demo?
There are some custom campaigns online as well.

hm? It's unique and not in the main game, thus worth playing too.

-_-

finished the demo level ^^

How you holding up in the game?