Hints

level 1

There is a link, click it!

level 2

Use your eyes

level 3

listen and you will hear it

level 4 "gateway"

click every thing first then ctrla

level 5 "bunkers"

The code is in vigenere

level 6 "Nothing"

its just 5

level 7

Nothing

level 8 "Home"

Stop

level 9 "yes"

remember when there was storys about that killer arcade machine?

level 10

The keyword is source

thats it!!! good luck