To get past level 8, turn on the switch on the top right of blue button and the switch above it. Then, turn on the button on the bottom right of the blue button. This gives you an option to have 3 buttons on. From the bottom right button in the blue circle, turn on all the lower section buttons apart from the one above the red circle. This will eventually unlock the door on level 8 letting you slide the door open to level 9. For more details go to http://www.gameteep.net/100-exits/level-8/.