Big Iron (SlowNibbler)

A side-scrolling "shooter" based on the song 𝘉𝘪𝘨 𝘐𝘳𝘰𝘯 by Marty Robbins.

There's still some bugs and you can probably find a couple hundred ways to break it, but I didn't want too much time debugging. 

If you're a legal representative for Mr. Robbins estate, please don't sue me.