Haha jolly good! The window is working as intended then!
Yeah I think it's possible too, I've tried a bunch myself and I think the best chance of getting yeeted out of the level is in the first timer room, probably messing with either the button plinth, or more likely, the wire as it's a bunch of rigidbodies on pin joints. I think crouching / standing / jumping into them at the right angle will break the physics.
The crouching works by shrinking and then expanding the player collision shape dynamically, so there may well be something there to break lol!
You're only the second person to manage to do that!! I've still not managed to do it and I must have played through that room hundreds of times by now 😂.