To beat 100 floors level 39, starting with the lower left corner, sliding your hand to the right, then drag it to the left upper corner (diagonal) to connect 4 dots (white round), and then down to the bottom, and the last pull up right corner (diagonal) and the door will open.
Remember! to win the 100 floors level 39, don't remove your finger throughout all the steps, follow the arrows in the figure. Hopefully you can win level 39
Now continue to the 100 floors level 40, or back to the 100th floors level 38