I suggest that the time of a map be viewable on the HUD/main interface. For two reasons:
1. So we don't have to press F1 to access the time,
2. Many new players seem to be oblivious to the fact that the game ends after a certain amount of time.
Side suggestion: When it is the final minute of the game I think it would be nice if the time shows tenths of a second (e.g. 14.4)