How do you beat level 25 in primary in less than 2 minutes

This will require flame jump from level 26. To flame jump, be red and hold Shift while jumping.

Flame jump to the next platform and kill the Stalker, then drop down to the right down to the button and kill the Buzzer on your way down. Drop some ice on the button, then flame jump to where you just came down from, then flame jump up to the platform above you and make your way to the door on the left. Run to the right, skip the first lever, hit the second. Stay on the second lever's platform and turn around and from the left side of the platform you're on, flame jump up to the platform above you, staying against it for the wall jump. Leave that lever alone and jump to the left, hit that lever, then proceed to the door. Jump to the red platform, and jump to blue. Put some ice, jump on the ice, and flame jump to the third blue platform. Put some ice down, jump on the ice, and flame jump to the blue platform. Put ice on the left side of that platform, jump on the ice, flame jump to the vertical beam, then flame jump again to the moving floor on the right. From the right side of that moving floor, flame jump up to the stationary platform to your right (you cannot grab the ledge of a moving floor), and hop up. Congratulations, you just skipped most of the level. Run over to the checkpoint and grab it (just in case) and drop a portal, then return to the stationary platform. Flame jump up to the yellow platform, then make your way up to the door as per usual and drop your portal. Go through the portal, jump to the blue platform, drop some ice, then instead of using the wall, flame jump straight to the platform. Drop ice on the button, turn yellow and walk off to the right, falling straight down, and go through your portal. Turn blue, and just run to the right; no need to jump or use the wall. Exit to the elevator