I did a run of this, and the final time was 903 seconds, but I'm not sure if that's the actual timing method used in this game. Did I get a 15:03 or did I get a 14:5x?

first pass the link of the video :V

game time is unreliable and inaccurate
timing rules can be seen in game rules

i got 864 seconds and it was a 14:30. you probably got like 15:09.867 (guess just in case it's actually 15:09.867, which would be funny) although i am yet to retime the run