How do you do open the door on 100 exits level 19?
check the related link for a video guide for this level.
Tilt your device so the can moves in front of the door. Then tilt your device toward you so the can moves closer to you (until it stops moving). Finally tilt your device away from you so the can slides into the door, breaking it. Move the can and go to the next level. See related link for screenshots.