Simple Shmup

This is a simple shmup for the Pico-8 fantasy console, written as an exercise to explore some basic features of the console.  Defend your sector from the loathsome Zargon menace!  Or maybe you're the Zargon, harassing innocent squishy green space-faring critters minding their own business...I dunno, whaddya want, I hacked this up in a few hours in a hotel room while watching Futurama. Anyway, I w…