100 Doors Remix Level 31 Walkthrough: Repeatedly shake your phone until you see the hammer. Pick it up. Pick up the paper on the right side. Use the hammer on the box on the right side, then tap to flip the switch. Repeatedly tap the painting on the left side until it falls. Look at the morse code on the wall, and use the paper to decode it: HIFG HIFG = 8967 (number in the alphabet). Change the number above the door to 8967.
100 Doors Remix Level 32 Walkthrough: Drag the N bottle to the left, then pick up the rope on the ground. Drag the rope to the glove in your inventory. Drag the glove to the top of the He bottle and the glove will fill up like a balloon and float up. Drag the glove balloon to below the door, then let go so the balloon hits the red button in the ceiling. Change the numbers above the door to 424. Drag the door to the left.
100 Doors Remix Level 33 Walkthrough: Pick up the blue fly swatter on the floor. Open all the computers you can and drag the fly swatter onto the flies. Drag the hammer to break open the computer to the right of the door, then take the paper inside. Drag the paper into the machine on the bottom right. (tap it to turn it on)
100 Doors Remix Level 34 Walkthrough: Drag the symbols so they're in order. The symbols represent the planets in the solar system. Order: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune. Pull the lever and slide the door open.
100 Doors Remix Level 35 Walkthrough: Use f(8) and figure out the number.Enter code 40320. Special thanks to Rose for this answer! :)