Beat the other battle first :). It has the same controls. This is continued to if you give the giant zombie head no waffle. Hold 'S' and press the green flag a couple of times while holding 'S' to skip the first bit. I would recommend to go through the text the first time round though .
All me except for music. (which I give credit to Louis Armstrong, some guy that I don't know the name of, and Undertale.) April 10 2016: Shared but unfinished and glitchy.