100 Doors Remix Level 21 Walkthrough: Drag the blue pillow to the left so it's under the glasses. Tap the glasses to make them fall. Pick them up and drag them to the door.
100 Doors Remix Level 22 Walkthrough: Figure out how many Kilobytes in 1 Megabyte = 1024. Press the button, then change the numbers to 1024.
100 Doors Remix Level 23 Walkthrough: Figure out 0xD7 in binary = 11010111. Turn on the following switches: 1st, 2nd, 4th, 6th, 7th, 8th. Slide the door to the right.
100 Doors Remix Level 24 Walkthrough: You have to have knowledge of Linus to solve this level. Since r = 4, w = 2, x = 1, 0+0+0, 4+0+1, 4+2+1, which gives you 057. Enter 057 into the numbers above the door, then tap the left compartment under the computer. Take the disc and drag it to the computer screen, then tap the screen. Drag the left door left, and right door right.
100 Doors Remix Level 25 Walkthrough: Shake your phone and pick up the key. Drag it to the first aid box to unlock it, then tap it. Take the bottle of oxygen and drag it to the boiling beaker. Tap the right side of the table to move it, then tap the floor tile underneath it. Take the red gloves and drag it to the beaker. Drag the frozen block to the lock, then tap the lock a few times to break it. Slide the door to the left.