Secret level: Enter TRYX as a password to begin game play
on level 15. Hold Down + Right arrows as you begin
the level until you pass through the floor and end up on a hidden
path that leads to a warp to a level that has no password. At
the beginning of the secret level, you will get all the alien
helpers, then fight a wave of enemies with the developers' heads.
At the end of this level, you will skip to level 36.