Answer 100 floors level 45 is grab a hammer from your inventory menu, and then solve the existing blower above the door. And grab the knife under the left side of the door, keep it in your inventory menu.
Then to beat 100 floors level 45 is had to take a knife and cut the rope to drop the balloon.
After the balloon float, tilt your phone so that the balloon toward the red button on top of the roof.
Now continue to the 100 floors level 46, or back to the 100 floors level 44