If you gather all of the 1UP's in the game and also beat it without dying
once, then you will notice that the music on the Intro screen is different
(after the credits complete.) At this point, if you start a new game and
then press 'G' then you can toggle on and off God Mode! While in God Mode
you are unaffected by gravity, you can rapidly shoot chowd blobs with left
click, go really fast by holding the space bar, and rapidly shoot chowd
nado's with right click.