Try this online puzzle game

"You have successfully completed all 50 levels of Truly Kryptic. We hope you found it enriching and entertaining. "
GAMEEEEEEUEEUUUHHHHHHHHHHHH

"You have successfully completed all 50 levels of Truly Kryptic. We hope you found it enriching and entertaining."
WHOOOOOOOOOOOSH

so for 13 I typed in the answer and it just said this:
a (Level 13)

Help?

Its one of six letters. Google each sentence for six letters.

HELP WITH 16!!!!

You have to change the picture.

I got that, but how?

I tried inspect element, nothing happened. I used images.google.com to find something, and nothing. I even tried one of its moons.

help with 15 please

Hint: phone number to letters converter