While this is a pensive puzzle game, a feature I considered throughout development was a clock that tracks level & full game completion time.  I decided to leave it out of the initial release and ask for player feedback:

1. If you have completed the game, do you think it would be fun to replay while competing against the clock? 
2. Should the clock be available on your first playthrough (in the options menu) or should it be unlocked after first completion?h
3. Do the two different endings interact with the clock differently?