This Jeff’s Shoot’Em Up is a tech demo for a top-down shooter in the same vein as Smash TV or Alien Breed, that was developed by Iguana Entertainment (Aero the Acrobat and Turok) to test the SNES capabilities. The demo was titled Jeff’s Shoot’Em Up probably after Jeff Spangenberg, Iguana (and later Retro Studios) founder. In this prototype enemies can’t harm the main character, every path lead to a dead end and sound is absent. Also in the introduction the spaceship that is zoomed in/out and rotated don’t appear correctly.