update: i figured it out!
so what you have to do is get to the end of sandboxone and blowurself into the milk beating the level, but then wait for yourself to fall off the platform and die, then restart and you will have a menu infront of you, but you will be able to move, then hit esc or whatever your unpause key is, and the timer will be frozen! then you can just beat the level and get a time of 00:00:0