It might seem silly to have a guide for a game that is 2½ minutes long, but there actually are a few things to consider when running this game to save time!

You can save time by grinding top edges of obstacles (doesn't work on every obstacle since you get stuck if you overdo it). I have found the pattern to reliably get at least 4 push glitches before you reach the open area where the tank spawn.

You move slightly faster while inside the tank. So running all the way to the end is slower by at least 10 seconds.

You should reach the bridge at a time of ~1:50-1:51 if you are on pace for a 2:30-2:31. So once you step on the bridge it's only 40 seconds left of the game. Easiest part in my opinion. Just make sure to practice the grenade throw at the end! I've missed a few times!