I think the game should have told you that it was a to oeasy to guess password, things like 123456, qqqqqq wouldn't be accepted. Thank you for trying it out! You typing in the password that you spammed made me laugh, I did think of caching all of the passwords and making sure variations couldn't be used, but I doubt anyone is making it to level 15 as it is.
My password (plus variations ) was abc12Ab!