Where can i log out
Why would you want to?
In the Flash game on PC, there's a LOG OUT button right above PLAY NOW.
/methinks that there is an automatic process on inactivity.
In the Desktop Early Access version, you are not automatically logged out after some period of inactivity.
To log out on Early Access, click Options (the gear-like button at the bottom right, next to Exit), then select "logout".