Time as points- High scores with time

How do i high scores with time. EXAMPLE If i faster (5s.) kill 10 foes my place in high score is 1st but when i kill in 4s my score ar highest?

if score < highscore

set highscore to score.

can you explain better?

Well, it would be better if you explained your problem a bit better.

Is your problem in actually recording the time, recording the high score, saving the high score, or replacing the high score with better scores?

my english is bad sorry:(

So my score is only time, when i end level with time (1:28) i want see this in high scores, its more better explained now?