Thanks for compliments and the feedback.
I did originally have it at a minute, but wanted the ending score to be higher, so you have the potential to see a nice big score at the end.
I think if i was to continue with the game, I might bring it back down to one minute, but change the scoring system from the current linear one (100, 200, 300, 400, etc), to one that doubles (100, 200, 400, 800, etc).