Level-1 = elgoog
Level-2 = VIBGYOR
Level-3 = kick me mom
Level-4 = Tab+Enter
Level-5 = Planck's constant
Level-6 = West Indies
Level-7 = All Whole Numbers between 1 and 10,000
Level-8 = G (hint:Drag from the corner and expand the window and type G as answer)
Level-9 = Type the sentence displayed in a notepad and paste it.(Ex. Kite Google Yeast Search Google Kite)
Level-10 = en
Level-11 = Are you ready?
Level-12 = <><<>><>> ( hint:Ths was displayed when you gave correct answer of a quesion before)
Level-13 = This is very simple.
Level-14 = What I want to convey by this document is that you have to enter this entire text in the textbox in order to move to next level.
Level-15 = Doc Happy Smelly Sneezy Stumpy Sleepy Grumpy dopey Droopy bashful
Level-16 = 1234567890
Level-17 = infinity
Level-18 = Bill Gates Sucks
Level-19 = 3.6055 ( hint:Square root of 13)
Level-20 = 0
Level-21 = jumanji
Level-22 = 16020
Level-23 = must admit that he was a first-rate political economist.
Level-24 = 500 (hint:A+B+C - AB-BC-CA + ABC)
Level-25 = 7340
Level-26 = Never
Level-27 = Yes
Level-28 = 9480157023859200 (hint: 366*24*60*60*299792458(Speed of light per second))